Biology Practice Test 2

MDCAT Practice Tests

1 / 100

Category: Biology Ch 11 Class 11

The oxidation of PGAL during glycolysis yields ____ molecules.

NUMS 2019 Reconduct
Biology
Bioenergetics
Elimination Tool:

A) ATP

B) FAD

C) FADH

D) ADP

2 / 100

Category: Biology Ch 10 Class 11

An amphibian’s heart has ______ chambers:

NUMS 2016
Biology
Kingdom Animalia
Elimination Tool:

A) Two

B) Three

C) Four

D) Five

3 / 100

Category: Biology Ch 1 Class 12

The site and principal mechanism for the passage of glucose into the bloodstream in the human kidney is the:

NTS 2014
Biology
Homeostasis
Elimination Tool:

A) collecting duct …. by active secretion

C) glomerulus …. by selective reabsorption

D) glomerulus …. by ultrafiltration

E) Proximal convoluted tubule …. By active reabsorption

4 / 100

Category: Biology Ch 10 Class 12

What is in q2 Hardy Weinberg equilibrium?

NTS 2019
Biology
Evolution
Elimination Tool:

A) Frequency of the dominant allele

B) Frequency of the recessive allele

C) Frequency of both alleles

D) Number of both alleles

5 / 100

Category: Biology

Q.61 Which of the following is a compensation point?

B. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants

C. Rate of photosynthesis increases, so do the O2 production, with a net release oxygen coupled with the uptake of CO2

D. Rate of respiration becomes more than rate of photosynthesis. 16 Net yield of H-O in Photosynthesis is

6 / 100

Category: Biology Ch 4 Class 12

Follicle – stimulating hormone, which is produced by the pituitary gland, stimulates the ovaries to produce:

NUMS 2019 Cancelled
Biology
Reproduction
Elimination Tool:

A) Estrogen

B) Estrogen and progesterone

C) Progesterone

D) Oxytocin

7 / 100

Category: Biology Ch 4 Class 11

Which of the following cell organelles involved in the synthesis of cell wall and middle lamella?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Endoplasmic reticulum

B) Golgi apparatus

C) Lysosomes

D) Peroxisomes

8 / 100

Category: Biology

Q.33 Food in plants is transported in the form of:

A. Monosaccharide

B. Polysaccharide

C. Disaccharide

D. Oligosaccharide

9 / 100

Category: Biology Ch 4 Class 11

Detoxification of drugs is the function of _____ in a cell.

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) R.E.R

B) S.E.R

C) Liver cells

D) Lysosome

10 / 100

Category: Biology

Cardiac output is increased by all of the following EXCEPT:

NUMS Mock 2
Biology
Transport

A) Hypoxia

B) Exercise

C) Sleep

D) Pregnancy

11 / 100

Category: Biology Ch 5 Class 12

Apical meristems are located at

Tips of leaves

Tips of flowers

Tips of roots and stems

Tips of roots only

12 / 100

Category: Biology Ch 1 Class 12

The major portion of (NH)2CO is secreted by:

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Sweat

B) Saliva

C) Urine

D) Stool

13 / 100

Category: Biology Ch 7 Class 12

Which statement is not true about phragmoplast?

Formed from vesicle originating from Golgi apparatus

Present in plants only

Formed at the end of anaphase

Centre of dividing cell

14 / 100

Category: Biology Ch 6 Class 11

A group of 8 cocci is called

Diplococci

Octococci

Tetrad

Sarcina

15 / 100

Category: Biology Ch 6 Class 12

Histones have abundance of amino acids

Valine and lysine

Arginine and lysine

Valine and arginine

Histidione and threonine

16 / 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

17 / 100

Category: Biology Ch 4 Class 11

Suggest which among the following is not a function attributed to endoplasmic reticulum?

PMC 2020
Biology
Cell Structure and Function
Elimination Tool:

A) Detoxification of poisons and drugs

B) Digestion/egestion of foreign materials outside the cell

C) Manufacture of fat and lipid molecules

D) Biogenesis of membrane proteins

18 / 100

Category: Biology Ch 3 Class 12

Resting membrane potential of neurons is _______, while during active membrane potential the inner membrane surface becomes more _____ than the outside.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) +70 mV ; negative

B) -70 mV ; negative

C) +70 mV ; positive

D) -70 mV ; positive

19 / 100

Category: Biology

Q.68 The spinal cord consist of which type of cell bodies?

A. Sensory neuron

B. motor neuron

C. connector neuron

D. all of these

20 / 100

Category: Biology Ch 9 Class 11

In bryophytes fertilization takes place in

Antheridia

Archegonia

water

Ovule

21 / 100

Category: Biology

The position of an organism in a food chain of an ecosystem called:

NUMS Mock 2
Biology
Man and His Environment

A) Level of ecosystem

B) Food chain

C) Food web

D) Trophic level

22 / 100

Category: Biology Ch 2 Class 12

Which of the following bones are present in the palm of the hand:

NTS 2010
Biology
Support and Movement
Elimination Tool:

A) Carpals

B) Metacarpals

C) Phalanges

D) Tarsal

23 / 100

Category: Biology Ch 8 Class 11

The most common example of members of the kingdom fungi is/are:

NUMS 2019 Reconduct
Biology
Kingdom Fungi
Elimination Tool:

A) Star fish

B) Mushrooms

C) Algae

D) Human

24 / 100

Category: Biology Ch 3 Class 11

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

NTS 2018
Biology
Enzymes
Elimination Tool:

A) Lysozyme

B) Amylase

C) Pepsin

D) Trypsinogen

25 / 100

Category: Biology Ch 9 Class 11

What is an example of sperms of liverworts, mosses, ferns which move towards archegonia, in response to nucleic acid released by the ovum?

PMC Practice 7
Biology
Kingdom Plantae
Elimination Tool:

A) Chemotropic movement

B) Chemonastic movement

C) Haptonastic movement

D) Chemotactic movement

26 / 100

Category: Biology

Q.36 The ETC in plants consists of an electron carrier called?

A. Pq

B. Pc

C. Pt

D.Po

27 / 100

Category: Biology Ch 6 Class 11

The word Archaeobacteria (a division of bacteria) derived from Greek means

True bacteria

False bacteria

Recent bacteria

Ancient bacteria

28 / 100

Category: Biology Ch 2 Class 12

Roots of a plant show

Positive phototropism and negative geotropism.

Negative phototropism and positive geotropism.

Negative tactic movement and positive tropic movement.

Positive geotropism of stem and roots

29 / 100

Category: Biology Ch 4 Class 11

Who first observed and thus hypothesized that new cells are formed from previously existing living cell?

Theodor Schwann and Schleiden

Rudolph Virchows

Louis Pasteur

Both b and c

30 / 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

31 / 100

Category: Biology Ch 5 Class 12

Nutrition to egg in ovary is provided by which of the following?

PMC Practice 1
Biology
Growth and Development
Elimination Tool:

A) Germ cells

B) Milk cells

D) All of these

C) Follicle cells

32 / 100

Category: Biology Ch 7 Class 12

Mitotic apparatus in animals is formed by

Aster and spindle

Polar and kinetochore microtubules

Spindle and RNA

Spindle only

33 / 100

Category: Biology Ch 13 Class 11

Lungs are spongy due to the presence of million of

Air sacs

Alveoli

Bronchioles

Parabronchi

34 / 100

Category: Biology Ch 3 Class 12

Which of the following statement about neuron is incorrect?

They not only conduct impulses but also generate them.

They are not the only cellular component of nervous system.

They may show limited regenerative capabilities.

Like all the living cell, when they mature and divide to form similar cells.

35 / 100

Category: Biology

Q.65 Which one of the following is the attribute of Lamarckism?

A. Natural selection

B. Inheritance of acquired characteristics

C. Struggle for existence

D. Production of more individuals

36 / 100

Category: Biology Ch 4 Class 12

Gametes in animals are produced by

Mitosis

RedMeiosis

BlueFission

Apomixis

37 / 100

Category: Biology

Q.67 Interaction between genes occupying different loci is:

A. Dominance

B. Pleiotropy

C. Epistasis

D. Gene linkage

38 / 100

Category: Biology

Q.53 Which of these is the best treatment for osteoarthritis?

A. Bed rest

B. Exercise

C. Cast

D. None of these

39 / 100

Category: Biology

Q.20 Which of the following bacteria possesses a sphericatshape?

A. Bacillus anthracis

B. Escherichia coli

C. Spirillum minus

D. Staphylococeus aureus

40 / 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

41 / 100

Category: Biology Ch 2 Class 12

The process of cartilage formation is known as:

NUMS 2014
Biology
Support and Movement
Elimination Tool:

A) Chondrioblasts

B) Chondriocutosis

C) Chondrogenesis

D) None of these

42 / 100

Category: Biology Ch 8 Class 12

A pea plant has purple colored flowers (dominant trait). To check the genotype, which of the following cross is performed

NUMS 2018
Biology
Variation and Genetics
Elimination Tool:

A) Test cross with homozygous white flowered plant

B) Test cross with homozygous purple flowered plant

C) Test cross with heterozygous purple flowered plant

D) Hybird cross

43 / 100

Category: Biology

Q.64 Which of the following conditions is not required to be true for a population in Hardy-Veinberg equilibrium?

A. Random mutation

B. Large population

C. No natural selection

D. Random mating

44 / 100

Category: Biology Ch 7 Class 12

Gametes in animals are produced by which of the following?

PMC Practice 2
Biology
Cell Cycle
Elimination Tool:

A) Mitosis

B) Meiosis

C) Fission

D) All of these options are correct

45 / 100

Category: Biology Ch 10 Class 11

Which one of the following animals possesses an open circulatory system:

NUMS 2014
Biology
Kingdom Animalia
Elimination Tool:

A) Amoeba

B) Earthworm

C) Grasshopper

D) Man

46 / 100

Category: Biology Ch 1 Class 12

Thick, waxy & leathery cuticle around leaves is present in

Hydrophytes

Mesophytes

Xerophytes

Halophytes

47 / 100

Category: Biology Ch 10 Class 12

In the Hardy – Weinberg principle,p2 + 2pq + q2= ?

NTS 2016 SMBBMC
Biology
Evolution
Elimination Tool:

A) 0

B) 1

C) Infinity

D) Any value between 0 to 1

48 / 100

Category: Biology Ch 12 Class 11

Nitrogen-fixing bacteria in root nodules fix nitrogen in soil air into:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Ammonia

B) Nitrite

C) Nitrate

D) Amino acid

49 / 100

Category: Biology

Q.48 Which of the following is incorrectly matched?

A. Glucagon- Beta cells

B. Corpus luteum- Progesterone

C. Insulin- Diabetes mellitus

D. Thyroid gland- Grave’s disease

50 / 100

Category: Biology Ch 2 Class 11

Among the most abundant biomolecules, _____ is the most abundant one on earth.

NUMS 2016
Chemistry
Biological Molecules
Elimination Tool:

A) Proteins

B) Carbohydrates

C) Lipids

D) Vitamins

51 / 100

Category: Biology Ch 14 Class 11

Semilunar valves are not present:

NUMS 2015
Biology
Transport
Elimination Tool:

A) At the base of the pulmonary trunk

B) At the base of the aorta

D) In the coronary arteries

C) In veins

52 / 100

Category: Biology Ch 9 Class 12

Which one has antibiotic resistance gene for tetracycline and ampicillin?

pSC 101

pBR 322

pCR 322

None of these

53 / 100

Category: Biology Ch 6 Class 12

Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called

Mutation

Transuction

Replication

Variation

54 / 100

Category: Biology Ch 9 Class 11

Dark purple or black spore cases of Claviceps purpurea are called:

NUMS 2015
Biology
Kingdom Plantae
Elimination Tool:

A) Smuts

B) Rusts

C) Ergots

D) Aspergins

55 / 100

Category: Biology Ch 1 Class 12

High level of _____ and _____ in the blood and the contributing factors in the formation of kidney stones.

NUMS 2018
Biology
Homeostasis
Elimination Tool:

A) Calcium, oxalate

B) Calcium, magnesium

C) Calcium, sodium

D) Sodium, sulphate

56 / 100

Category: Biology Ch 5 Class 12

The fate of each blastomere is foretold. What will that cleavage be?

PMC Practice 9
Biology
Growth and Development
Elimination Tool:

A) Spiral and indeterminate

B) Radial and indeterminate

C) Radial and determinate

D) Spiral and determinate

57 / 100

Category: Biology Ch 9 Class 11

The flower of family gramineae process contain two scales below ovary which are called:

NUMS 2014
Biology
Kingdom Plantae
Elimination Tool:

A) Glumes

B) Lemma and palea

C) Lodicule

D) Rochella

58 / 100

Category: Biology Ch 3 Class 11

Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called

Cofactor

Coenzymes

Activator

Enzymes

59 / 100

Category: Biology Ch 13 Class 12

The actual or preserved remains of the organisms that lived in the ancient past are called:

UHS 2018
Biology
Man and His Environment
Elimination Tool:

A) Fossils

B) Impression

C) Ancient prints

D) Ancient cast

60 / 100

Category: Biology

Q.31 Due to short distance between lungs and heart, walls of right ventricle are:

A. Thicker than left ventricle

B. Thicker than right atrium

C. Thinner than right atrium

D. Thinner than left ventricle

61 / 100

Category: Biology Ch 1 Class 11

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:

Older sediment layers have equal amount of these reaioactive isotopes as that of the young ones

Older sediment layers have less amount of these reaioactive isotopes as that of the young ones.

Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.

Older sediment layers did not have these radioactive isotopes

62 / 100

Category: Biology Ch 4 Class 12

In biennials and perennials, low temperature stimulus is not received by

Shoot apex of mature stem

Embryo of the seed

Leaves of the plants

None of the above

63 / 100

Category: Biology Ch 5 Class 11

Kingdom Protoctista includes:

Prokaryotic organisms

Unicellular organisms

Fungi

Eu-cariotiquic organisms

64 / 100

Category: Biology

Q.55 Complete breakdown of glucose molecule takes place in which of the following?

A. Alcoholic fermentation

B. Lactic acid fermentation

C. Aerobic respiration

D. None of these

65 / 100

Category: Biology Ch 5 Class 11

Those organisms which can prepare their own food from simple inorganic material and can store energy are called

Autotrophs

Heterotrophs

Procariotique

Eu-cariotique

66 / 100

Category: Biology

The excretion of hypertonic urine in humans is associated best with the:

NUMS Mock 1
Biology
Homeostasis

A) Glomerular capsule

B) Proximal convoluted tubule

C) Loop of Henle

D) Distal convoluted tubule

67 / 100

Category: Biology Ch 8 Class 11

Saccharomyces cerevisiae is the scientific name of a:

NUMS 2017
Biology
Kingdom Fungi
Elimination Tool:

A) Fungus

B) Smut

C) Bacterium

D) Yeast

68 / 100

Category: Biology

Q.34 If the non-protien part is loosely attached to the protein part in the enzyme, it is known as

A. coenzyme

B. prosthetic group

C. cofactor

D. apoenzyme

69 / 100

Category: Biology Ch 12 Class 11

Plants absorb it in the form of soluble phosphates. It is present abundantly in the growing and storage organs of plants. What is it?

NTS 2012
Biology
Nutrition
Elimination Tool:

A) H2O

B) CO2

C) K

D) P

70 / 100

Category: Biology Ch 6 Class 11

Rod-shaped bacteria are known as _______

UHS 2018
Biology
Kingdom Prokaryote
Elimination Tool:

A) Spirilla

B) Bacilli

C) Spirochete

D) Cocci

71 / 100

Category: Biology Ch 7 Class 11

Trypanosoma belongs to class:

NTS 2011
Biology
Kingdom Protista
Elimination Tool:

A) Sarcodina

B) Flagellata

C) Ciliata

D) Suctoria

72 / 100

Category: Biology Ch 13 Class 11

Haemoglobin carries more oxygen than plasma by:

NTS 2011
Biology
Gaseous Exchange
Elimination Tool:

A) 50 times

B) 20 times

C) 70 times

D) 100 times

73 / 100

Category: Biology

When were bacteriophages discovered by Twort?

NUMS Mock 2
Biology
Bio-diversity | Variety of Life
Variety of Life

A) 1915

B) 1920

C) 1910

D) 1820

74 / 100

Category: Biology Ch 10 Class 11

Species of phylum Platyhelminthes are:

NTS 2011
Biology
Kingdom Animalia
Elimination Tool:

A) Roundworms

B) Flat worms

C) Hook worms

D) Thread worms

75 / 100

Category: Biology Ch 9 Class 12

Which of the following characteristics makes plasmid DNA useful for researchers?:

PMC Practice 9
Biology
Biotechnology
Elimination Tool:

A) Readily incorporate cloned DNA

B) Capable of automatic replication

C) Capable of being isolated from genomic DNA

D) All of these

76 / 100

Category: Biology Ch 2 Class 11

In an isotonic solution there would be:

NTS 2016 SMBBMC
Biology
Biological Molecules
Elimination Tool:

A) No net movement of water

B) Net movement of water into the cell

C) Net movement of water out of the cell

D) Bursting of the cell

77 / 100

Category: Biology

The type of plastids found in roots of plants are _____.

NUMS Mock 4
Biology
Cell Structure and Function

A) Chloroplasts

B) Chromoplasts

C) Leucoplasts

D) All of these options are correct

78 / 100

Category: Biology Ch 12 Class 11

Amylase is not produced by the following type(s) of salivary gland:

NUMS 2015
Biology
Nutrition
Elimination Tool:

A) Parotid

B) Submandibular

C) Sublingual

D) None of the given options are correct

79 / 100

Category: Biology Ch 10 Class 12

Mating with non-relatives is known as?

PMC Sample 2
Biology
Evolution
Elimination Tool:

A) Inbreeding

B) Outbreeding

C) Breeding

D) None of these options is correct

80 / 100

Category: Biology Ch 2 Class 11

Movement of ions and large molecules with the help of protein molecules in and out of the cell is called _________.

NTS 2016 DUHS & JSMU
Biology
Biological Molecules
Elimination Tool:

A) Diffusion

B) Facilitated diffusion

C) Passive transport

D) Osmosis

81 / 100

Category: Biology Ch 11 Class 11

Which of the following processes does NOT need Pyruvic Acid as a substrate?

PMC 2020
Biology
Bioenergetics
Elimination Tool:

A) Alcoholic fermentation

B) Calvin cycle

C) Aerobic respiration

D) Lactic Acid fermentation

82 / 100

Category: Biology Ch 5 Class 11

Organisms of which of the following kingdom have absorptive mode of nutrition:

Prokaryotae

Protoctista

Animalia

Fungi

83 / 100

Category: Biology Ch 5 Class 12

he only promoter of Leaf’s senescence in the following plant hormones is:

PMC Practice 9
Biology
Coordination and Control
Growth and Development
Elimination Tool:

A) Gibberellins

B) Cytokinins

C) Auxins

D) Abscisic acid

84 / 100

Category: Biology Ch 4 Class 11

DNA is found in which of the following structures?

NUMS 2016
Biology
Cell Structure and Function
Elimination Tool:

A) Golgi complex

B) Lysosomes

C) Mitochondria

D) Ribosomes

85 / 100

Category: Biology Ch 5 Class 11

Vaccines for all of these have been developed EXCEPT:

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

A) Polio

B) Mumps

C) Measles

D) Cancer

86 / 100

Category: Biology Ch 5 Class 12

Function of intercalary meristems is

. Increase in length

Increase in diameter

Production of leaves and flowers

None of these

87 / 100

Category: Biology Ch 8 Class 12

Read the passage below to answer the question:

Hemophilia is a disorder in which blood fails to clot. Saad, a male hemophiliac, marries Sara, a normal woman and together they have four children, two boys (Ahmed and Ali) and two girls (Alia and Ayesha). None of the children display the symptoms of Hemophilia. Ahmed, Ali, Ayesha, and Ali all marry normal individuals and have children. None of Ahmeds or Ali’s children, male or female, display symptoms of hemophilia, but the sons of Alia and Ayesha display symptoms of hemophilia while the daughters of Alia and Ayesha do not.

Which of the following individuals are heterozygous for hemophilia:

NTS 2010
Biology
Variation and Genetics
Elimination Tool:

A) Saad, Ahmed, and Ali

B) Ahmed, Ali, Alia, and Ayesha

C) Saad and Sara

D) Alia and Ayesha

88 / 100

Category: Biology Ch 7 Class 12

At what phase the DNA content of a cell is doubled?

PMC 2020
Biology
Cell Cycle
Elimination Tool:

A) Prophase

B) Interphase

C) Anaphase

D) Telophase

89 / 100

Category: Biology

Q.68 Enzymes are globular proteins because

A. They have a primary structure.

B. They have a secondary structure.

C They have a tertiary structure,

D. All of the above.

90 / 100

Category: Biology Ch 10 Class 11

Coelom that develops from the archenteron as outpouching is

Pseudocoelom

Enterocoelom

Schizocoelom

None of these

91 / 100

Category: Biology Ch 10 Class 11

Of the following which one is not found in series proterostomia.

Annelida

Arthropoda

Mollusea

Echinodermata

92 / 100

Category: Biology

Q.61 Herbivores always occupy :

A. T1

B. T3

C. T2

D. T4

93 / 100

Category: Biology Ch 12 Class 11

Absorption of digested food occurs mainly in:

NUMS 2014
Biology
Nutrition
Elimination Tool:

A) Colon

B) Small intestine

C) Large intestine

D) Stomach

94 / 100

Category: Biology Ch 6 Class 12

In a typical nucleotide, the nitrogenous base is attached to _______ carbon of pentose sugar.

NTS 2010
Biology
Chromosomes and DNA
Elimination Tool:

B) 5th

C) 4th

D) 3rd

E) 1st

95 / 100

Category: Biology Ch 1 Class 12

Excretory system, consisting of protonephridia tubes, are present in phylum:

NUMS 2020
Biology
Homeostasis
Elimination Tool:

A) Porifera

B) Annelida

C) Platyhelminthes

D) Cnidaria

96 / 100

Category: Biology Ch 7 Class 12

In case of neurons, post mitotic cell escapes cell cycle and remain in _______ phase whthout proliferating further

G0 phase

G1 phase

G2 phase

S phase

97 / 100

Category: Biology Ch 3 Class 12

The directional movement toward or away from the stimulus is called:

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Tropism

B) Orientation

C) Taxi

D) Non orientation

98 / 100

Category: Biology

Q.19 Darwins theory mainly focuses o

A. Origin of life

B. How Orgais extinct

C. How new Species arise

D How organism form

99 / 100

Category: Biology

Which of the following compounds possesses a single covalent bond between carbon and hydrogen?

NUMS Mock 4
Chemistry
Hydrocarbons

A) CH4

B) C2H2

C) C2H4

D) All of the above

100 / 100

Category: Biology Ch 5 Class 11

Viruses resemble living things because they:

NTS 2017
Biology
Bio-diversity | Variety of Life
Elimination Tool:

A) Circulate

B) Move

C) Reproduce

D) Are crystalline

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