Biology Practice Test 4

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Biology Practice Test 4

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1 / 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

2 / 100

Category: Biology

Q.66 Which of the following provides the strong evidence in support of evolution:

A. Fossil record

B. Comparative embryology

C. Comparative anatomy

D. Molecular biology

3 / 100

Category: Biology Ch 8 Class 12

In the pea plants, the factors round and yellow seeds (RRYY) is dominant over wrinkled and green seeds (rryy). Keeping this in mind, identify the seed that has the genotype round and green.

NTS 2011
Biology
Variation and Genetics
Elimination Tool:

A) Rryy

B) rrYy

C) RrYy

D) RRYy

4 / 100

Category: Biology Ch 6 Class 12

In DNA A.

A forms two bonds with T

G forms three bonds with C

A forms three bonds with T

Both a and b

5 / 100

Category: Biology

Q.27 The stimulus for the production of more gastrin hormone from the gastric endocrine lining is:

A. Protein content of the food

B. Carbohydrate content of the food

C. Lipid content of the food

D. Partially digested food nutrients

6 / 100

Category: Biology Ch 4 Class 12

In cloning, nucleus is introduced into

Somatic cell

Egg cell

Sperm cell

None of thes

7 / 100

Category: Biology Ch 12 Class 11

Which of the following are animals with pointed ends and a tube like digestive tract?

NTS 2016 DUHS & JSMU
Biology
Nutrition
Elimination Tool:

A) Annelida

B) Arthropoda

C) Nematoda

D) Mollusca

8 / 100

Category: Biology Ch 8 Class 12

Which statement about dominant and recessive alleles is not correct?

NTS 2016 SMBBMC
Biology
Variation and Genetics
Elimination Tool:

A) A dominant characteristic is seen in the phenotype of a heterozygote.

B) A homozygous genotype may be either dominant or recessive.

C) Recessive phenotypes always have two recessive alleles.

D) The phenotype of a homozygote is always dominant.

9 / 100

Category: Biology Ch 3 Class 11

The Induced fit model was introduced by Koshland in which of the following year?

PMC Sample 1
Biology
Enzymes
Elimination Tool:

A) 1960

B) 1961

C) 1959

D) 1966

10 / 100

Category: Biology Ch 3 Class 12

Deficient production of hormones by adrenal glands results in: .

NTS 2011
Biology
Coordination and Control
Elimination Tool:

A) Cushing's syndrome

B) Addison's disease

C) Diabetes Mellitus

D) Goiter

11 / 100

Category: Biology

Lymph nodes are not present:

NUMS Mock 1
Biology
Coordination and Control

A) Neck region

B) Axilla

C) Groin

D) Spleen

12 / 100

Category: Biology Ch 11 Class 11

The end product of Glycolysis is:

NTS 2011
Biology
Bioenergetics
Elimination Tool:

A) Glucose-6-phosphate

B) Fructose-6-phosphate

C) Pyruvate

D) 3-Phosphoglycerate

13 / 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

14 / 100

Category: Biology Ch 9 Class 11

Antheridia and archegonia are born on _____ in bryophytes

Sporophyte

Gametophyte

Both of these

None of these

15 / 100

Category: Biology Ch 8 Class 11

Parasitic fungi absorb nutrients directly from the living host cytoplasm with the help of special hyphal tips called

Mildew

Constricting ring

Haustoria

All of thes

16 / 100

Category: Biology Ch 6 Class 12

The diploid human chromosome set has:

NTS 2016 SMBBMC
Biology
Chromosomes and DNA
Elimination Tool:

A) 22 pairs of autosomes and 1 pair of sex chromosomes

B) 22 pairs of autosomes and XY chromosomes

C) 22 pairs of autosomes and XX chromosomes

D) Haploid somatic cells and diploid germinal cells

17 / 100

Category: Biology Ch 1 Class 12

Which of the following types of transpiration account for 5 – 7 % of total transpiration that take place in plants?

NUMS 2019 Cancelled
Biology
Homeostasis
Elimination Tool:

A) Cuticular

B) Lenticular

C) Stomatal

D) Leaves

18 / 100

Category: Biology Ch 6 Class 12

Bacteria were grown in a medium containing heavy isotope of nitrogen (N15) for many generations and all their DNA contained many heavy nitrogen only. A bacterium of this type was transferred to normal medium and allowed to duplicate. After two divisions of heavy DNA is likely to be that:

NTS 2012
Biology
Chromosomes and DNA
Elimination Tool:

A) Only one daughter cell will have heavy DNA

B) Two daughter cells have normal DNA and other two have heavy DNA

C) All daughter cells have heavy DNA

D) Half daughter cells have heavy DNA and other half have normal DNA

19 / 100

Category: Biology Ch 2 Class 11

The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is:

High specific heat of vaporization

High specific heat capacity

Its Dipole nature

Its liquid state

20 / 100

Category: Biology Ch 10 Class 11

Amphibians live on:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Water

B) Water and land

C) Land

D) Air

21 / 100

Category: Biology Ch 9 Class 12

In prokaryotes only one type of RNA polymerase is present, while ______ types of RNA polymerase are present in eukaryotes.

NUMS 2019 Reconduct
Biology
Biotechnology
Elimination Tool:

A) Two

B) Three

C) Four

D) Five

22 / 100

Category: Biology Ch 2 Class 12

Many _______ expel a large amount of water by special structures called contractile vacuoles:

NUMS 2020
Biology
Support and Movement
Elimination Tool:

A) Protozoa

B) Porifera

C) Echinoderm

D) Fish

23 / 100

Category: Biology Ch 5 Class 12

A bean seed contains all of the following except:

NTS 2012
Biology
Growth and Development
Elimination Tool:

A) A seed coat

B) An epicotyl

C) A hypocoty

D) A hypha

24 / 100

Category: Biology Ch 6 Class 11

In a bacterial cell, plasma membrane with all things present within it is called:

PMC Sample 3
Biology
Kingdom Prokaryote
Elimination Tool:

A) Cytoplasmic matrix

B) Cytoplasm

C) Protoplast

D) Cell Structure

25 / 100

Category: Biology Ch 14 Class 11

In the human body, blood circulating from the gut to the heart passes through the:

NTS 2013
Biology
Transport
Elimination Tool:

A) aorta

B) kidneys

D) lungs

C) llver

26 / 100

Category: Biology Ch 5 Class 11

Recent studies on HIV reveal that the virus infects and multiplies in _____ but does NOT cause disease in them.

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

A) Monkeys

B) Cats

C) Horses

D) Dogs

27 / 100

Category: Biology Ch 11 Class 11

Dark reaction of photosynthesis takes place in _______ of chloroplast.

NUMS 2020
Biology
Bioenergetics
Elimination Tool:

A) Thylakoids

B) Grana

C) Intergrana

D) Stroma

28 / 100

Category: Biology Ch 2 Class 12

Joints found at the vertebrates are:

NTS 2014
Biology
Support and Movement
Elimination Tool:

A) gliding joints

C) partially moveable joints

B) sliding joints

D) fixed joints

29 / 100

Category: Biology Ch 11 Class 11

Chlorophyll is insoluble in:

Carbon tetrachloride

Alcohol

Organic solvents

Water

30 / 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

31 / 100

Category: Biology Ch 10 Class 12

The genetic change in a population caused by natural selection is called?

PMC Sample 1
Biology
Evolution
Elimination Tool:

A) polymorphism

B) specialization

C) gene linkage

D) adaptation

32 / 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

33 / 100

Category: Biology Ch 6 Class 11

A type of bacterial cell that is completely surrounded by flagella is called:

PMC Practice 5
Biology
Kingdom Prokaryote
Elimination Tool:

A) Diplococcus

B) Tetrad

C) Peritrichous

D) Munotrichous

34 / 100

Category: Biology

What type of virus is the smallpox virus?

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

A) DNA enveloped virus

B) RNA enveloped virus

C) DNA virus

D) RNA naked virus

35 / 100

Category: Biology Ch 13 Class 11

Lungs are covered with double layered thin membranous sac called

Disphragm

Pleura

Pericardium

Rib cage

36 / 100

Category: Biology Ch 11 Class 11

Visible light used in photosynthesis ranges from:

300 – 700 nm in wavelength

350 – 750 nm in wavelength

380 – 750 nm in wavelength

390 – 790 nm in wavelength.

37 / 100

Category: Biology Ch 13 Class 11

The passageways of the respiratory system mucous secreting cells called:

NTS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Tracheal cells

B) Goblet cells

C) Surfactant cells

D) Pleural cells

38 / 100

Category: Biology Ch 2 Class 12

In presence of muscle contraction, ______ is brought closer, _____ shortens and ______ disappears.

NUMS 2019 Reconduct
Biology
Support and Movement
Elimination Tool:

A) Z – line, H – zone, I – band

B) I – band, Z – line, H – zone

C) Z – line, I – band, H – zone

D) H – zone, I – band, Z – line

39 / 100

Category: Biology Ch 12 Class 11

Hydra is an example of _______ feeder

Fluid

Macrophagous

Fluid

All of these

40 / 100

Category: Biology Ch 5 Class 11

Which of the following organisms have Chitin as a major structural component of their cell wall:

Prokaryotae

Protoctista

Plantae

Fungi

41 / 100

Category: Biology

The Latin words of the name given to a human being, Homo Sapiens, include the:

NUMS Mock 1
Biology
Bio-diversity | Variety of Life

B) Family and order

C) Order and class

D) Genus and class

E) Genus and species

42 / 100

Category: Biology Ch 1 Class 12

The excretory product that requires minimum water for its elimination compared to others is:

NUMS 2017
Biology
Homeostasis
Elimination Tool:

A) Creatinine

B) Ammonia

C) Urea

D) Uric Acid

43 / 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

44 / 100

Category: Biology Ch 13 Class 12

Which of the following describes an ecological niche?

NTS 2015 SMBBMC
Biology
Man and His Environment
Elimination Tool:

A) The habitat in which an organism finds its food supply

B) The habitat in which an organism find the most suitable climate

C) the relationship between an organism and other species

D) the way in which an environment is exploited by an organism

45 / 100

Category: Biology

Q.2 Competitive inhibition can be overcome by using

A. Low concentration of substrate

B. High concentration of inhibitor

C. Moderate concentration of inhibitor

D. High concentration of substrate

46 / 100

Category: Biology Ch 4 Class 11

70S sized ribosomes are found in the cytoplasm of:

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Algae

B) Fungi

C) Protozoans

D) Bacteria

47 / 100

Category: Biology Ch 4 Class 12

Testes are structures that produce:

NTS 2015 SMBBMC
Biology
Reproduction
Elimination Tool:

A) Spores

B) Sperms

C) Seeds

D) Ova

48 / 100

Category: Biology Ch 13 Class 11

As pH of blood decreases, H+ ions increases, which combine the proteins part of hemoglobin, to decrease its ability to bind with:

NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:

A) O2

B) CO2

C) CO

D) H2

49 / 100

Category: Biology Ch 9 Class 11

The release of droplets of water from hydathodes is called:

PMC 2021 Tested
Biology
Kingdom Plantae
Elimination Tool:

A) Respiration

B) Guttation

C) Vaporization

D) Transportation

50 / 100

Category: Biology

The spectrum of He is expected to be similar to that of:

NUMS Mock 4
Chemistry
Atomic Structure

A) Hydrogen

B) Sodium

C) Oxygen

D) Li+

51 / 100

Category: Biology Ch 3 Class 12

Which of the following is used in brewing industry to promote malting:

Gibberellins

Cytokinins

Auxins

Abscisic Acid

52 / 100

Category: Biology

The system involved in preparing our body in condition of stress and emergency:

NUMS Mock 2
Biology
Coordination and Control

A) Nervous system only

B) Endocrine system only

C) Both nervous & endocrine system

D) Both endocrine & exocrine

53 / 100

Category: Biology Ch 1 Class 11

Oxygen accounts for ____ % of totals human body mass:

65%

18%

10%

3%

54 / 100

Category: Biology Ch 5 Class 12

Growth of multicellular plants occur in

Two phases

Three phases

Five phase

Four phases

55 / 100

Category: Biology

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

NUMS Mock 1
Biology

A) Na+

B) K+

C) Mg2+

D) Cl-

56 / 100

Category: Biology Ch 2 Class 11

Which of these is not a disaccharide?

NUMS 2018
Biology
Biological Molecules
Elimination Tool:

A) Fructose

B) Sucrose

C) Lactose

D) Maltose

57 / 100

Category: Biology Ch 1 Class 12

Vascular Cambium initially appears as actively dividing cells between:

Primary Xylem and secondary xylem.

Primary xylem and secondary phloem

Primary xylem and primary phloem

Secondary xylem and secondary phloem

58 / 100

Category: Biology

The RNA found in Ribosomes is:

NUMS Mock 1
Biology
Chromosomes and DNA

A) mRNA

B) rRNA

C) tRNA

D) Polysome

59 / 100

Category: Biology Ch 11 Class 11

Light reaction takes place on/in

Thylakoid

Storma

Chloroplast

Grana

60 / 100

Category: Biology Ch 12 Class 11

Percentage of magnesium by mass in a human being is:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) 0.005%

B) 0.25%

C) 0.15%

D) 0.35%

61 / 100

Category: Biology Ch 9 Class 12

Chemical nature of primers used in the PCR process is _______.

UHS 2018
Biology
Biotechnology
Elimination Tool:

A) RNA

B) Protein

C) Carbohydrate

D) DNA

62 / 100

Category: Biology Ch 3 Class 12

Which one of the following is common to all neurons?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) A cell body which contains a nucleus

B) A thick myelin sheath

C) Presence of node of Ranvier

D) Presence of Schwann cells

63 / 100

Category: Biology

Which of the following is not an infection of the lungs/respiratory tract?

NUMS Mock 2
Biology
Gaseous Exchange

A) Histoplasmosis

B) Tuberculosis

C) Cystic fibrosis

D) None of the given options

64 / 100

Category: Biology Ch 1 Class 12

Malpighian tubules are involved in excretion in:

NTS 2011
Biology
Homeostasis
Elimination Tool:

A) Cockroach

B) Earthworm

C) Human

D) Planaria

65 / 100

Category: Biology Ch 13 Class 11

In most birds air sacs are _____ in number

10

3

4

9

66 / 100

Category: Biology Ch 6 Class 12

A tortion of chromatin that is condensed only during cell division is

Euchromatin

Heterochromatin

Biochromatin

Nucleochromatin

67 / 100

Category: Biology Ch 11 Class 11

RuBP + O2 —Rubisco—> PGA + _______

NTS 2016 DUHS & JSMU
Biology
Bioenergetics
Elimination Tool:

A) Phosphoglycerate

B) Phosphoglycolate

C) Glycerate

D) Glycolate

68 / 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

69 / 100

Category: Biology Ch 3 Class 12

Type of neurons found exclusively in CNS are:

Sensory neurons

Motor neurons

Associative neurons

None of these

70 / 100

Category: Biology

Q.58 Which of the following is incorrect for ascent of sap?

A. water potential

B. Cohesion tension

C. root pressure

D. imbibition

71 / 100

Category: Biology Ch 7 Class 11

Most of the photosynthesis on earth is carried by

Kelps

Gymnosperms

Angiosperms

Algae

72 / 100

Category: Biology Ch 6 Class 11

Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch?

A specific organism can always be found in association with a given disease

The organism can be isolated and grown in pure culture in the laboratories

The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.

It is possible to recover the organism in pure culture from the experimentally infected animals.

73 / 100

Category: Biology

Which of the following basic structural level of proteins is indicated by an association of two alpha and two beta chains in the haemoglobin molecule?

NUMS Mock 4
Biology
Biological Molecules

A) Primary structure

B) Secondary structure

C) Tertiary structure

D) Quatenary Structure

74 / 100

Category: Biology Ch 7 Class 11

Plasmodium belongs to

Ciliates

Apicomplexans

Actinopods

Foraminferans

75 / 100

Category: Biology Ch 4 Class 12

In humans, ovaries after birth contain:

NUMS 2018
Biology
Reproduction
Elimination Tool:

A) Oogonia

B) Primary oocyte

C) Secondary oocyte

D) Ova

76 / 100

Category: Biology Ch 9 Class 11

Which of the following is an ovoviviparous organism?

PMC Sample 3
Biology
Kingdom Plantae
Elimination Tool:

A) reptiles

B) mammals

C) frog

D) Duckbill platypus

77 / 100

Category: Biology

Q.33 The researcher notices that round seeds occur maturely in the environment.Based solely on this information, what can there searcher conclude about the round phenotype?

A. It is dominant

B. It is recessive

C. It is wild type

D. Both a and b

78 / 100

Category: Biology

Q.39 Which of the following genetic diseases is caused by mutations in a membrane protein?

A. Alzheimer's disease

B. Parkinson's disease

C. Anemia

D. Hemolytic anemia

79 / 100

Category: Biology Ch 4 Class 11

Tay Sach’s disease is caused by absence of enzyme required to breakdown ____________.

NUMS 2014
Biology
Cell Structure and Function
Elimination Tool:

A) Lipids

B) Glycogen

C) Glucose

D) Proteins

80 / 100

Category: Biology Ch 2 Class 11

Which of the statement is not true for compounds like glycoprotein and glycolipids?

They are conjugated molecules of carbohydrates

Both have role in the extra cellular matrix of animals and bacterial cell wall

They are components of biological membranes.

Both are produced and secreted by endoplasmic reticulum

81 / 100

Category: Biology Ch 10 Class 11

Both radial and bilateral symmetry is found in the phylum

Protozoa

Porifera

Echinodermata

None of these

82 / 100

Category: Biology

Lamarck is best known for his theory of:

NUMS Mock 3
Biology
Evolution

A) Inheritance

B) Dominance

C) Inheritance of acquired characteristics

D) All of the above

83 / 100

Category: Biology Ch 9 Class 11

Why do Bryophytes and ferns both require water for fertilization?

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Ciliated spermatozoa instead of flagellated spermatozoa

B) Sporophyte as the main generation instead of the gametophyte generation

D) Non-motile eggs

C) Flagellated spermatozoa can travel

84 / 100

Category: Biology Ch 4 Class 11

The basic structural framework of all types of membranes are:

NUMS 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Phospholipids

B) Glycoproteins

C) Lipoproteins

D) Nucleoproteins

85 / 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

86 / 100

Category: Biology Ch 4 Class 12

Which method is of asexual reproduction?

Sporulation

Fission

Apomixis

All of these

87 / 100

Category: Biology Ch 7 Class 12

DNA is synthesized and chromosome number is doubled in

G1 phase

S phase

G2 phase

G0 phase

88 / 100

Category: Biology

The dark reactions of photosynthesis are characterized by:

NUMS Mock 1
Biology
Bioenergetics

A) Synthesis of ATP, O2 and NADH

B) Utilization of ATP, CO2 and NADPH

C) Electron transfer from NADPH to RuBP

D) Carbon dioxide transfer from RuBP to glucose

89 / 100

Category: Biology Ch 3 Class 12

Normal action potential of a neuronal cell is :

plus 50 mv

plus 60 mv

plus 70 mv

plus 80 mv

90 / 100

Category: Biology Ch 12 Class 11

Secretion of pancreatic juice is stimulated by:

NUMS 2019 Cancelled
Biology
Nutrition
Elimination Tool:

A) Secretin

B) Gastrin

C) Pepsinogen

D) Both secretin and gastrin

91 / 100

Category: Biology Ch 5 Class 12

Leukaemia is associated with an increased number of _____ in blood.

NTS 2016 DUHS & JSMU
Biology
Growth and Development
Elimination Tool:

A) Erythrocytes

B) Basophils

C) Eosinophils

D) Leucocytes

92 / 100

Category: Biology

A man who has type AB blood cannot father a child with type ___ blood, because he would pass on either the ___ or the B allele to all of his offspring.

NUMS Mock 4
Biology
Variation and Genetics

A) A,O

B) O,A

C) B, O

D) B, A

93 / 100

Category: Biology Ch 11 Class 11

In the Krebs cycle, substrate-level phosphorylation accompanies the formation of:

NTS 2013
Biology
Bioenergetics
Elimination Tool:

A) Citrate

B) Alpha-ketoglutarate

C) Succinate

D) Fumarate

94 / 100

Category: Biology

The element in basic structure of proteins which differentiate them from carbohydrates is?

NUMS Mock 1
Biology
Biological Molecules

A) Carbon.

B) Hydrogen.

C) Nitrogen.

D) None of these options is correct.

95 / 100

Category: Biology Ch 4 Class 11

Which one of the following organelles is required for aerobic respiration?

NTS 2018
Biology
Cell Structure and Function
Elimination Tool:

A) Nucleus

B) Mitochondrion

C) Endoplasmic reticulum

D) Plastids

96 / 100

Category: Biology Ch 12 Class 11

Magnesium is present in which of the following?

Cytochromes

ATP

Chlorophyll

Haemoglobin

97 / 100

Category: Biology Ch 7 Class 11

This protist has isomorphic alternation of generation:

PMC 2021 Tested
Biology
Kingdom Protista
Elimination Tool:

A) Phytopthora

B) Chlorella

C) Ulva

D) Euglena

98 / 100

Category: Biology Ch 9 Class 11

Which type of leucoplasts store lipids?

NUMS 2020
Biology
Kingdom Plantae
Elimination Tool:

A) Amyloplast

B) Elaioplast

C) Proteinoplast

D) Etioplast

99 / 100

Category: Biology Ch 2 Class 11

Cn(H2O)n. is a general formula of :

Monosaccharides

Oligosaccharides

Ploysacharides

100 / 100

Category: Biology Ch 5 Class 12

Over-secretion of cortical hormone causes a disease called;

UHS 2015
Biology
Growth and Development
Elimination Tool:

A) Cushing’s Disease

B) Diabetes Mellitus

C) Hypoglycemia

D) Addison’s Disease

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