BIOLOGY PAST PAPERS MCQS 2015 MDCAT TEST 1

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ONLINE QUIZ PRACTICE TEST BIOLOGY PAST PAPERS MDCAT MBBS MCQ WITH ANSWERS

Q.133 In _____________ response, β-cells produce plasma cells that synthesize antibodies andrelease in blood plasma and tissue fluid.

1 point

A) Cell-Mediated

B) Hormonal

C) Humoral

D) Phototactic

Q.134 Passive immunity is used against:

1 point

A) Malaria

B) Typhoid

C) Dengue

D) Tetanus

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Q.135 B-lymphocytes are named due to their relationship with:

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A) Blood

B) Bursa of Fabricius

C) Bone Marrow

D) Bile Duct

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Q.136 In the light-independent stage of photosynthesis, the CO2 combines with _______ to form an unstable 6-carbon intermediate

1 point

A) Ribulose bisphosphate

B) Hexose sugar

C) Glycerate-3-phosphate

D) Glyceraldehyde-9-phosphate

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Q.137 In glycolysis, glycerate-1,3-bisphosphate is converted into glycerate-3-phosphate by losing_____________ phosphate molecules.

1 point

A) 3

B) 2

C) 1

D) 4

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Q.138 Malate is oxidized by _______ to oxaloacetate in Krebs’s Cycle.

1 point

A) ATP

B) NADP

C) NAD

D) FAD

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Q.139 In the electron transport chain, the electrons from NADH and FADH2 are passed to;

1 point

A) Cytochrome a

B) Cytochrome a3

C) Co-enzyme c

D) Co-enzyme Q

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Q.140 Carriers of the respiratory chain are located on:

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A) Matrix of mitochondria

B) Outer membrane of mitochondria

C) Inner membrane of mitochondria

D) Cytoplasmic matrix

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Q.141 In cystic fibrosis, liposomes-microscopic vesicles are sued which are coated with:

1 point

A) Healthy Gene

B) Chromosome

C) Protein

D) Carbohydrate

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Q.142 The DNA formed by the reverse transcription is called:

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A) rDNA

B) dDNA

C) cDNA

D) DNA

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Q.143 Bacterial cells take up recombinant plasmids when they are treated with:

1 point

A) CaCl2

B) NaCl

C) KCl

D) NaOH

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Q.144 Which one of the following is made up of radioactively labeled nucleotides?

1 point

A) Phage DNA

B) Genomic Library

C) Recombinant DNA

D) Gene Probe

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Q.145 A technique in transgenic animals in which the desired gene is inserted into the eggs of animal is called:

1 point

A) Embryonic Stem Cell mediated Transfer

B) Microinjection

C) Retro-virus mediated gene Transfer

D) Virus vectors

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Q.146 Ozone is a layer of atmosphere extending from ___________ km above earth and absorbsultraviolent radiations.

1 point

A) 10-50

B) 50-60

C) 5-30

D) 10-80

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Q.147 Light rays from the sun are absorbed by CO2 and re-radiate as ________ radiations.

1 point

A) Ultraviolent

B) Indigo

C) Infra-Red

D) Green

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Q.148 The gases which are produced by the burning of fossils fuels and are responsible for acid rain are:

1 point

A) CFCs

B) CO2 and CO

C) HCl and Oxides of Nitrogen

D) SO2 and Oxides of Nitrogen

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Q.149 During successions, the first organisms that develop on the bare rock are:

1 point

A) Lichens

B) Shrubs

C) Moss

D) Herbs

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Q.150 Trophic level of a herbivore in a given food-web is:

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A) 1

B) 3

C) 4

D) 2

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Q.151 During maternal mitosis, non-disjunction of autosomal chromosome pair results in the formation of an egg having 24 chromosomes in:

1 point

A) Klinefelter’s Syndrome

B) Down’s Syndrome

C) Turner’s Syndrome

D) Jacob’s Syndrome

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Q.152 Typical symptoms like enlarged breasts and small testis in the male are attributed to:

1 point

A) Down’s Syndrome

B) Turner’s Syndrome

C) Klinefelter’s Syndrome

D) Phenylketonuria

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