BIOLOGY PAST PAPER 2012 MDCAT MBBS TEST 4

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THIS TEST IS ABOUT ALL TOPICS OF BIOLOGY MCQS QUIZ TEST 4

Q.192 Which of the following is an unsaturated fatty acid?

1 point

A) Acetic Acid

B) Butyric acid

C) Oleic acid

D) Palmitic acid

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Q.193 Which of the following combination of base pairs is absent in DNA?

1 point

A) A–T

B) C–G

C) A–U

D) T–A

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Q.194 The type of inhibition in which inhibitor has no structural similarity to the substrate and combined with an enzyme at other than the active site is called

1 point

A) Irreversible inhibition

B) Competitive inhibition

C) Non-competitive and reversible inhibition

D) Reversible inhibition

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Q.195 The inhibitors that bind tightly and permanently to enzymes and destroy their globular structure and catalytic activity are

1 point

A) Reversible inhibitors

B) Irreversible inhibitors

C) Competitive inhibitors

D) Non-competitive inhibitors

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Q.196 Enzyme succinate dehydrogenase converts succinate into

1 point

A) Malate

B) Malonic acid

C) Citrate

D) Fumarate

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Q.197 If the detachable co-factor is an inorganic ion then it is designated as

1 point

A) Coenzyme

B) Prosthetic group

C) Holoenzyme

D) Activator

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Q.198 In HIV viruses, reverse transcriptase converts single-stranded RNA into double-stranded viral DNA. This process is called

1 point

A) Translation

B) Duplication

C) Replication

D) Reverse Transcription

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Q.199 Mesosomes are infoldings of the cell membrane and are involved in

1 point

A) DNA replication

B) RNA synthesis

C) Protein synthesis

D) Metabolism

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Q.200 Most widespread problem of the antibiotics misuse is the

1 point

A) Rapid cure

B) Increased resistance in pathogen

C) Disturbance of metabolism

D) Immunity

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Q.201 Which of the following component is found in the cell wall of fungi?

1 point

A) Cellulose

B) Chitin

C) Proteins

D) Glycerol

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Q.202 The male reproductive parts of the flower are called

1 point

A) Gynoecium

B) Calyx

C) Androecium

D) Corolla

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Q.203 Fasciola is the name given to

1 point

A) Tapeworm

B) Planaria

C) Liver fluke

D) Earthworm

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Q.204 Ascaris is

1 point

A) Diploblastic

B) Triploblastic

C) Haploid

D) Acoelomate

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Q.205 During development, in an animal, the mesoderm layer gives rise to

1 point

A) Nervous System

B) Alimentary canal lining

C) Muscular and skeletal system

D) Mouth

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Q.206 Polymorphism is a characteristic feature of

1 point

A) Porifera

B) Cnidaria

C) Annelida

D) Nematodes

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Q.207 The muscles of the stomach walls thoroughly mix up the food with gastric juices and the resulting semi-solid / semi-liquid material is called

1 point

A) Bolus

B) Bolus or chime

C) Mucus

D) Chyme

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Q.208 Trypsinogen is converted into trypsin by the activity of

1 point

A) Goblet cells

B) Absorptive cells

C) Enterokinase

D) Peptidase

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Q.209 In large intestines, vitamin K is formed by the activity of

1 point

A) Symbiotic bacteria

B) Obligate parasite

C) Parasitic bacteria

D) Facultative bacteria

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Q.210 Goblet cells secrete

1 point

A) HCl

B) Mucus

C) Enzymes

D) Amylase

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Q.211 mature mammalian red blood cells do not have

1 point

A) Nucleus

B) Red color

C) Fluids

D) Haemoglobin

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Q.212 In a normal person plasma constitutes about ___________ by volume of blood

1 point

A) 50%

B) 60%

C) 45%

D) 55%

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Q.213 Which vein has oxygenated blood?

1 point

A) Renal vein

B) Subclavian vein

B) Pulmonary vein

D) Jugular vein

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Q.214 What is the residual volume of air which always remains inside the lungs of human?

1 point

A) 3.5 Liters

B) 0.5 Liters

C) 5.0 Liters

D) 1.5 Liters

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Q.215 In the nephron, most of the reabsorption takes place in the

1 point

A) Distal tubule

B) Proximal tubule

C) Ascending limb

D) Descending limb

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Q.216 Detection of change and signaling for effector’s response to the control system is a

1 point

A) Negative feedback

B) Positive feedback

C) Inter-coordination

D) Feedback mechanism

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Q.217 What are the three components of the mechanism of homeostatic regulations?

1 point

A) Receptors, control centre and effectors

B) Sensory, motor and associative neurons

C) CNS, PNS and diffused nervous system

D) Cerebrum, cerebellum and pons

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Q.218 Blood enters the glomerulus through

1 point

A) Efferent arteriole

B) Afferent arteriole

C) Renal artery

D) Renal vein

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Q.219 Which portion of the nephron is under the control of ADH?

1 point

A) Bowman’s capsule

B) Ascending arm

C) Distal and collecting ducts

D) Descending arm

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Q.220 Cause of Parkinson’s disease is the death of brain cells that produce

1 point

A) Dopamine

B) Acetylcholine

C) ADH hormone

D) Oxytocin

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The enzyme which is responsible for the active uptake of Na+ ions from the ascending limb of the loop of Henle

1 point

testosterone

aldosterone

ADH

vassopressin

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