Biology Practice Test 2

Biology Practice Test 2 is designed to help students strengthen their understanding of key biological concepts, theories, and processes for competitive entry tests like MDCAT, NUMS, AKU, UET, ECAT, NTS, as well as FSC Board Exams. This test covers topics from molecular biology, cell division, human physiology, plant physiology, and more, helping students improve accuracy and retention.

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Biology Practice Test 2

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1 / 100

Category: Biology

Q.5 Which statement is incorrect?

A. In short day plants red light prevents flowering

B. In long day plants for red light promotes flowering

C. Leaf unrolling occurs in grasses

D. Henbane is a short-day plant

2 / 100

Category: Biology Ch 6 Class 12

Genetic information in the DNA is encoded as:

NTS 2018
Biology
Chromosomes and DNA
Elimination Tool:

A) Deoxyribose sugar

B) Ribose sugar

C) Phosphate group

D) Sequence of nitrogenous bases

3 / 100

Category: Biology Ch 5 Class 12

Meristems are of

. Two types

Three types

Four types

Five types

4 / 100

Category: Biology Ch 2 Class 12

Molluscs have an exoskeleton made up of:

NTS 2016 DUHS & JSMU
Biology
Support and Movement
Elimination Tool:

A) Protein

B) Silica

D) Cuticles

C) CaCO3

5 / 100

Category: Biology Ch 9 Class 11

Below the point at which the cotyledons are attached, the embryo axis is called _______.

NTS 2016 SMBBMC
Biology
Kingdom Plantae
Elimination Tool:

A) Radicle

B) Epicotyl

C) Hypocotyl

D) Coleoptile

6 / 100

Category: Biology Ch 3 Class 11

Which step causes activation of catalytic site of an enzyme?

Change in pH of the surroundings.

Formation of Enzyme Susstrate complex.

Change in the charge of the active site.

Change in temperature

7 / 100

Category: Biology Ch 9 Class 11

Brassica and rosa plant belong to the group of plants:

NUMS 2017
Biology
Kingdom Plantae
Elimination Tool:

A) Hydrophytes

B) Mesophytes

C) Xerophytes

D) Succulent

8 / 100

Category: Biology Ch 10 Class 11

Pinacocytes forms ______.

NUMS 2018
Biology
Kingdom Animalia
Elimination Tool:

A) Pores

B) Ostia

C) Epidermis

D) Spongocoel

9 / 100

Category: Biology Ch 4 Class 11

Percentage of proteins in cell membrane is

20-40%

40-50%

60-80%

80-100%

10 / 100

Category: Biology

Q.66 Which one of the following is a non-protein group covalently bonded to a few respiratory enzymes among others?

A. Nicotine adenine dinucleotide

B. Flavin adenine dinucleotide

C. Nicotinamide adenine dinucleotide phosphate

D. All of the above

11 / 100

Category: Biology

Q.18 The internal buds are known as which of the following?

A. Spicules

B. Choanocytes

C. Gemmules

D. Both A and B

12 / 100

Category: Biology Ch 5 Class 12

Amniotic fluid in human embryo protects it from:

NUMS 2014
Biology
Growth and Development
Elimination Tool:

A) Degeneration

C) Encasement

B) Jerks

D) None of these

13 / 100

Category: Biology Ch 6 Class 11

Which of the following organelles are present in all the bacteria?

NTS 2014
Biology
Kingdom Prokaryote
Elimination Tool:

A) Mesosome

B) Golgi bodies

C) Mitochondria

D) Chloroplast

14 / 100

Category: Biology

Q.10 Synaptic vesicles discharge which hormone at the neuromuscular junction?

A, acetylcholine

B. adrenaline

C. estradiol

D. testosterone

15 / 100

Category: Biology Ch 4 Class 12

Which organ(s) in the male reproductive system produce gametes?

NUMS 2018
Biology
Reproduction
Elimination Tool:

A) Vas deferens

B) Malpighian tubule system

C) Seminiferous tubules

D) Ejaculatory duct

16 / 100

Category: Biology Ch 3 Class 12

_________ is sometimes given by injection as an emergency treatment in cardiac arrest:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Acetylcholine

B) Dopamine

C) Serotonin

D) Epinephrine

17 / 100

Category: Biology Ch 13 Class 12

Process that supplies food to living things through decaying and decomposition is called

. Food cycle

Nutrient cycle

Dead-live cycle

None of these

18 / 100

Category: Biology

Q.12 An enzyme without its cofactor is called.

A. Coenzyme

B. Apoenzyme

C. Holoenzyme

D. Proenzyme

19 / 100

Category: Biology

Q.29 Fluid secreted by Sertoli cells provides sperms with which of the following ?

A. Liquid medium

B. Protection

C. Nourishment

D. All of these

20 / 100

Category: Biology Ch 7 Class 11

Cyanobacteria resemble photosynthetic eukaryotes because they have:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) PS-I

B) None of these

C) PS-I and PS-II both

D) PS-II

21 / 100

Category: Biology Ch 8 Class 12

Filial is a Latin word. It means

Spring

Issue

Progeny

Descendent

22 / 100

Category: Biology Ch 2 Class 11

Ribosomes are composed of almost an equal amount of:

NUMS 2018
Biology
Biological Molecules
Elimination Tool:

A) Protein & Lipid

B) Protein & RNA

C) RNA & Lipid

D) RNA & Carbohydrates

23 / 100

Category: Biology

Which of the following is correct in case of active membrane potential?

NUMS Mock 2
Biology

A) Extra cellular sodium is high

B) Extra cellular potassium is high

C) Intracellular sodium is high

D) Intracellular potassium is less

24 / 100

Category: Biology Ch 1 Class 12

In a marine environment, the ion secreted by the kidney is:

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Na+

B) K+

C) Mg2+

D) Cl-

25 / 100

Category: Biology Ch 9 Class 11

In Pakistan, the furniture wood is mainly obtained from the members of family:

UHS 2010
Biology
Kingdom Plantae
Elimination Tool:

A) Rosaceae

B) Solanaceae

C) Minosaceae

D) Fabaceae

26 / 100

Category: Biology Ch 7 Class 11

Lime stone deposits are formed from

Zooflagellates

Foraminferans

Aetinopods

Apicomplexans

27 / 100

Category: Biology Ch 11 Class 11

Exposure to ______ light is effective in photosynthesis as it enables guard cells to take up K+ and open the stomata.

NUMS 2015
Biology
Bioenergetics
Elimination Tool:

A) Red

B) Blue

C) Green

D) Orange

28 / 100

Category: Biology

The Porifera are pore – bearing animals, commonly called:

NUMS Mock 3
Biology
Kingdom Animalia

A) Corals

B) Sponges

C) Hydras

D) Anemones

29 / 100

Category: Biology Ch 7 Class 12

The second stage of the Prophase of Meiosis, following Leptotene, during which homologous chromosomes begin to pair is called:

NTS 2019
Biology
Cell Cycle
Elimination Tool:

A) Anaphase

B) Zygotene

D) Pachytene

C) Diplotene

30 / 100

Category: Biology Ch 5 Class 11

HIV is a:

NUMS 2018
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Virus

B) Prions

C) Viroid

D) Venom

31 / 100

Category: Biology Ch 9 Class 11

Thick, waxy & leathery cuticle around leaves is present in which of the following?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) Hydrophytes

B) Mesophytes

D) Xerophytes

C) Halophytes

32 / 100

Category: Biology Ch 7 Class 11

Most of the photosynthesis on earth is carried by

Kelps

Gymnosperms

Angiosperms

Algae

33 / 100

Category: Biology

Hepatic and Pancreatic secretions are also stimulated by a hormone called:

NUMS Mock 4
Biology
Coordination and Control

A) Gastrin

B) Secretin

C) Glucagon

D) Insulin

34 / 100

Category: Biology Ch 10 Class 12

What was the source of hydrogen for first photosynthetic organisms?

Water

Hydrogen present in soil

Hydrogen sulphate

Hydrogen sulphide

35 / 100

Category: Biology

Q.50 Which of the following hormones is essential for the production of sperms?

A. LH
B. Estrogen
C. Gonadotrophin hormones
D. Testosterone

A. LH

B. Estrogen

C. Gonadotrophin hormones

D. Testosterone

36 / 100

Category: Biology Ch 2 Class 11

The melting point of unsaturated fatty acids:

NUMS 2019 Reconduct
Biology
Biological Molecules
Elimination Tool:

A) Increases with increase in double bonds

B) Decreases with increase in double bonds

C) Rises in some and falls in others

D) There is no relationship between unsaturation and melting point

37 / 100

Category: Biology Ch 14 Class 11

Consider the following statements regarding blood pressure:

1. It is the pressure exerted by the blood on the walls of any vessel.

2. It decreases in the arteries as the distance from the heart increases.

3. It is lower in the capillaries than in the arteries.

4. It is usually lower in women than in men.

Choose the correct statements.

NTS 2015 DUHS and JSMU
Biology
Transport
Elimination Tool:

A) 1, 2 and 3 are correct.

B) 2, 3 and 4 are correct.

C) 1 and 4 are correct.

D) 1, 2, 3 and 4 are correct.

38 / 100

Category: Biology Ch 14 Class 11

What will happen, if there is an increase in plasma albumin?

NUMS 2014
Biology
Transport
Elimination Tool:

A) Increased blood pressure

B) Increased rate of heart

C) Greater accumulation of tissue fluid

D) Decreased filtration in glomerulus

39 / 100

Category: Biology Ch 6 Class 12

The Meselson and Stahl experiment confirmed that DNA replicates in _____ manner.

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Conservative

B) Semi – conservative

C) Dispersive

D) New synthesis

40 / 100

Category: Biology Ch 4 Class 12

In human females, oocytes are held in the second metaphase until ________.

NUMS 2019 Reconduct
Biology
Reproduction
Elimination Tool:

A) Death

B) Birth

C) Ovulation

D) Fertilization

41 / 100

Category: Biology Ch 13 Class 11

Which one of the following is a genetic disorder in which abnormally thick mucus is produced in the lungs and other parts of the body?

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Lung cancer

B) Chronic bronchitis

C) Cystic fibrosis

D) Emphysema

42 / 100

Category: Biology Ch 8 Class 12

______ alleles both have an effect on the phenotype of a heterozygous organism:

PMC 2020
Biology
Variation and Genetics
Elimination Tool:

A) Dominant

B) Recessive

C) Co-dominant

D) Multiple

43 / 100

Category: Biology Ch 11 Class 11

NADH produces how many ATP?

NUMS 2016
Biology
Bioenergetics
Elimination Tool:

A) 2 ATP

B) 3 ATP

C) 4 ATP

D) 6 ATP

44 / 100

Category: Biology Ch 11 Class 11

C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:

Photosynthesis

Aerobic respiration

Anaerobic respiration

Respiration

45 / 100

Category: Biology Ch 1 Class 11

Which character differentiates living things from non-living organisms?

They live in the same ecosystem.

They are acted upon by the same environment

They are highly organized and complex made of one or more cells and contain genetic material

Both a and b

46 / 100

Category: Biology Ch 5 Class 12

In cystic fibrosis, liposomes-microscopic vesicles are sued which are coated with:

UHS 2015
Biology
Growth and Development
Elimination Tool:

A) Healthy Gene

B) Chromosome

D) Carbohydrate

C) Protein

47 / 100

Category: Biology

Q48 Which statement is incorrect about Lock and Key Model?

A. Specific enzyme can transform only a specific substrate

B. Active site of an enzyme is a non-flexible structure

C. Active site does not change before during or even after the reaction

D. It explains the mechanism of every chemical reaction

48 / 100

Category: Biology

Q.32 Which one of the following is not a feature of the nervous system of Planaria?

A. Neurons are differentiated into sensory, motor and associative neurons.

B. Nerves are present.

C. No specialized sensory organs are present

D. All of the above.

49 / 100

Category: Biology Ch 8 Class 12

A man with blood group “A” marries a woman of blood group “B”. Both are heterozygous. What is the off-springs having phenotype “O”

Zero

25%

50%

75%

50 / 100

Category: Biology Ch 11 Class 11

FADH2 is produced during which step of Krebs cycle?

NUMS 2015
Biology
Bioenergetics
Elimination Tool:

A) When Isocitrate is converted into alpha – ketoglutarate

B) When alpha – Ketogluterate is converted into Succinate

C) When Succinate is converted into Fumarate

D) When Fumarate is converted into Maltose

51 / 100

Category: Biology Ch 5 Class 11

Which one of the following is NOT a mode of transmission of AIDS?

NTS 2019
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Through unsterilized needles

B) Through contact with open wounds

D) Through holding hands

C) Through blood transfusion

52 / 100

Category: Biology Ch 14 Class 11

How many ml of blood is pumped by each contraction of the heart?

NUMS 2016
Biology
Transport
Elimination Tool:

A) 80 ml

B) 90 ml

C) 70 ml

D) 60 ml

53 / 100

Category: Biology Ch 8 Class 12

A monohybrid cross yielded 3:1 in F2. What could be mode of inheritance?

Segregation

Independent assortment

Both of these

None of these

54 / 100

Category: Biology Ch 10 Class 12

Key point to Lamarck’s view about organic evolution is that every offspring

NUMS 2014
Biology
Evolution
Elimination Tool:

A) is similar to its parents

B) inherits characters acquired by the parental generation

C) shows struggle for existence

D) repeats phylogeny in its ontogeny

55 / 100

Category: Biology Ch 4 Class 11

Which of the statement about cell membrane is not true?

It contains protein molecules embedded in lipid bilayer

It is a differentially permeable membrane.

It contains charged pores thus ions being charged particles cross cell membrance much easier than neutral particles.

It may get infolded to engulf solid or liquid material.

56 / 100

Category: Biology Ch 3 Class 12

Chlorosis, i.e., yellowish hue on the leaves results from

Accumulation of toxic waste products in leaves.

Deficiency of chlorophyll.

Short supplies of mineral nutrients in the soil

All of these

57 / 100

Category: Biology Ch 9 Class 12

The technique use of identification of criminals is called:

NTS 2018
Biology
Biotechnology
Elimination Tool:

A) Cloning

B) DNA fingerprinting

C) Restriction Analysis

D) Polymorphism

58 / 100

Category: Biology Ch 10 Class 12

A group of interbreeding individuals belonging to a particular species and sharing a common geopraphic area is called?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) community

B) family

C) race

D) population

59 / 100

Category: Biology

Now-a-days every newborn gets regular shots of vaccine for polio. It contains _________ for polio to make a child immune against this disease.

NUMS Mock 4
Biology
Bio-diversity | Variety of Life

A) Antibiotics

B) Antibodies

C) Antigens

D) Antisera

60 / 100

Category: Biology Ch 6 Class 12

Genetic code is a ______ code and out of 64 codons, _____ are nonsense codons.

NUMS 2019 Reconduct
Biology
Chromosomes and DNA
Elimination Tool:

A) Single ; two

B) Single ; three

C) Triplet ; two

D) Triplet ; three

61 / 100

Category: Biology Ch 10 Class 11

All the animals of the grade radiata are

Diploblastic

Triploblastic

Both

Unicellular

62 / 100

Category: Biology

Optimum pH for action of pepsin and salivary amylase is

NUMS Mock 2
Biology
Nutrition

A) 3.5 and 7.7 respectively

B) 1.8 and 6.8 respectively

C) 6.8 and 7.4 respectively

D) 1.8 and 7.4 respectively

63 / 100

Category: Biology Ch 8 Class 12

Pick the correct option about Drosophila.

NUMS 2015
Biology
Variation and Genetics
Elimination Tool:

A) The Male is larger with a pointed abdomen

B) The female has sex combs on its front legs

C) It has a generation time of just eight weeks

D) Salivary gland cells have giant chromosomes in their nuclei

64 / 100

Category: Biology Ch 4 Class 11

A group of cells performing same function are known as:

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) Organelles

B) Tissues

C) A system

D) Both A and B

65 / 100

Category: Biology Ch 3 Class 11

If we add more substrate to an already occurring enzymatic reaction and it has no affect on the rate of reaction, the process is called?

PMC Practice 2
Biology
Enzymes
Elimination Tool:

A) Denaturation

B) Saturation

C) Composition

D) Inhibition

66 / 100

Category: Biology Ch 3 Class 11

What is not true about the induced fit model:

NUMS 2018
Biology
Enzymes
Elimination Tool:

A) Explains mechanism of enzyme action

B) Enzyme is specific in nature

C) Enzyme is a flexible structure

D) Enzyme doesn’t show change during reaction

67 / 100

Category: Biology Ch 5 Class 12

In multicellular plants cell division occur by

Binary fission

Conjugation

Meiosis

Mitosis

68 / 100

Category: Biology

Which of the following is NOT a difference that would allow one to distinguish between a prokaryotic and a eukaryotic cell?

Presence of absence of the nucleus
Presence or absence of the cell wall
Membrane bound versus no membrane bound organelles
NUMS Mock 3
Biology
Cell Structure and Function

A) I only

B) II only

C) III only

D) I and II only

69 / 100

Category: Biology

Gel electrophoresis is a technique:

NUMS Mock 1
Biology
Biotechnology

A) Employed by forensic scientist to assist in the identification of the individuals by their respective type of DNA

B) Collect all the genes found in one complete set of chromosome

C) Is a technique to separate different sizeds fragment of charge bearing polymers (proteins, RNA or DNA)

D) Grows single cell or a group of cells in a glass ware on artificial medium under aseptic conditions

70 / 100

Category: Biology Ch 1 Class 12

In humans, the temperature regulation control center is located in:

PMC 2020
Biology
Homeostasis
Elimination Tool:

A) Kidneys

B) Brain

C) Lungs

D) Liver

71 / 100

Category: Biology Ch 3 Class 11

Inhibitors which block the enzyme by forming weak bond are called

Competitive inhibitors.

Non-competitive inhibitors

Irreversible inhibitors.

Both a and b

72 / 100

Category: Biology Ch 6 Class 12

A fern has _____ pairs of chromosomes.

NTS 2012
Biology
Chromosomes and DNA
Elimination Tool:

A) 23

B) 40

C) 500

D) 13

73 / 100

Category: Biology Ch 7 Class 11

Bacteria that can only survive in the presence of oxygen?

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Facultative anaerobes

B) Obligate aerobes

C) Obligate anaerobes

D) Facultative aerobes

74 / 100

Category: Biology Ch 7 Class 11

Which of the following statements is correct?

NUMS 2017
Biology
Kingdom Protista
Elimination Tool:

A) Viruses have their own ribosomes for protein formation

B) New viral ribosomes are formed after viral DNA enters the cell

C) Viruses do not need ribosomes for protein formation

D) Viruses use the host ribosomes for their own requirements

75 / 100

Category: Biology Ch 10 Class 11

Which vertebrate groups have scaly skin?

NTS 2013
Biology
Kingdom Animalia
Elimination Tool:

A) amphibians and fish

B) amphibians and mammals

C) fish and mammals

D) fish and reptiles

76 / 100

Category: Biology Ch 5 Class 11

Encircle the miss – match:

NTS 2016 SMBBMC
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Colds…Rhinovirus

B) Yellow fever … Bacteria

C) Encephalitis … Virus

D) Minus strand RNA virus … Paramyxovirus

77 / 100

Category: Biology Ch 8 Class 12

Which of the following is monohybrid cross

TT x tt

TTYy x Ttyy

Both of these

None of these

78 / 100

Category: Biology Ch 7 Class 12

Interphase is a phase of the cell cycle defined only by the absence of _______.

NTS 2019
Biology
Cell Cycle
Elimination Tool:

A) Enzymes

B) DNA

C) Replication

D) Cell division

79 / 100

Category: Biology Ch 5 Class 12

Speed of growth is

Rapid throughout

Slow throughout

First slow then rapid then slow again

First rapid then slow

80 / 100

Category: Biology Ch 3 Class 11

If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of

Enzymes get denatured at higher substrate conc.

Rate of reaction is indirectly proportional to substrate concentration at this point.

All the active sites on enzyme molecule are occupied.

None of these.

81 / 100

Category: Biology Ch 5 Class 12

Thymus is found in the human body in _____.

PMC Practice 2
Biology
Growth and Development
Elimination Tool:

A) The medulla oblongata

B) The mediastinum of the upper thorax

C) Both Options A and B are correct

D) None of these options is correct

82 / 100

Category: Biology Ch 5 Class 12

Developing seeds are rich source of

Auxins

Gibberellins

Cytokinins

All of these

83 / 100

Category: Biology

The branch of science dealing with the fossil record is called:

NUMS Mock 2
Biology
Biology and its Major Fields of Specialization

A) Genetics

B) Taxonomy

C) Archeology

D) Palentology

84 / 100

Category: Biology Ch 2 Class 11

Antibodies are

NUMS 2019 Cancelled
Biology
Biological Molecules
Elimination Tool:

A) Primary proteins

B) Secondary proteins

C) Tertiary proteins

D) Quaternary proteins

85 / 100

Category: Biology Ch 11 Class 11

The organisms able to use sunlight directly as a source of energy are

Plants

Animals

Omnivores

Fungi

86 / 100

Category: Biology

Q.7 A neuron located in the cential hervous system that projects its axon outside the CNS is called:

A. Motor nerve

B. Sensory nerve

C. Both A and B

D. Mixed nerve

87 / 100

Category: Biology

Q.44 When calcium gates of the smooth endoplasmic reticulum are open, then calcium is released into:

A. Cytosol

B. Organelle lumen

C. Nucleoplasm

D. Directly taken up by myofilament

88 / 100

Category: Biology Ch 1 Class 12

Capillaries present around the loop of Henle:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Vasa recta

B) Peritubular

C) Lacteals

D) Glomerulus

89 / 100

Category: Biology Ch 12 Class 11

The propulsive movement of the gastrointestinal tract (GI tract) is:

NTS 2010
Biology
Nutrition
Elimination Tool:

A) Peristalsis

B) Epiglottis

C) Antiperistalsis

D) Anus

90 / 100

Category: Biology

What type of atom is the carbon atom?

NUMS Mock 2
Biology
Biological Molecules

A) Divalent

B) Monovalent

C) Trivalent

D) Tetravalent

91 / 100

Category: Biology Ch 13 Class 11

The air spaces may comprise upto ______ of total volume of leaf surface.

30%

20%

40%

50%

92 / 100

Category: Biology

The enzyme found in saliva responsible for the digestion of carbohydrates is:

NUMS Mock 4
Biology
Enzymes

A) Lysozyme

B) Amylase

C) Pepsin

D) Trypsinogen

93 / 100

Category: Biology

Q.2 Prokaryotic and eukaryotic cells generally have which of the following features in common?

A. Cell wall made of cellulose

B. Presence of linear chromosome

C. Presence of ribosomes

D. Presence of nucleus

94 / 100

Category: Biology Ch 6 Class 11

Under the microscope, the bacteria appear a bluish-purple color. Which class of bacteria are on the slide?

PMC Practice 5
Biology
Kingdom Prokaryote
Elimination Tool:

A) Helix

B) Around

C) Rod

D) Rigid helix

95 / 100

Category: Biology

Q.46 Which part of the brain connects the cerebrum with the spinal cord?

A. Forebrain

B. Cerebrum

C. Cerebellum

D. Brainstem

96 / 100

Category: Biology Ch 13 Class 12

Overgrazing results in:

NUMS 2019 Cancelled
Biology
Man and His Environment
Elimination Tool:

A) Totally barren lands

B) Good pastured lands

C) Salinity

D) Rocky areas

97 / 100

Category: Biology Ch 10 Class 11

Coelom is a cavity lined by:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Mesoderm

B) Endoderm

D) Ectoderm

C) Epiderm

98 / 100

Category: Biology

Red-green color-blindness is an X-linked recessive disorder. Jacob’s paternal grandfather and father are both color-blind, but his mother has two normal alleles. What is the probability that Jacob is red-green color-blind?

NUMS Mock 2
Biology
Variation and Genetics

A) 0%

B) 25%

C) 50%

D) 75%

99 / 100

Category: Biology Ch 9 Class 12

Which statement is not true about PCR?

Developed by Kary Mullis

Take its name from DNA polymerase

Is not very specific

Taq polymerase is used

100 / 100

Category: Biology Ch 8 Class 11

An association between two organisms benefiting both is called

UHS 2010
Biology
Kingdom Fungi
Elimination Tool:

A) Commensalism

B) Parasitism

C) Predation

D) Symbiosis

Your score is

The average score is 57%

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