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Latest mdcat Important mcqs for mdcat entry test:
1:Bacteriophages, or phages are also known as
A) bacteria facilitator
B) bacteria eater
C) animal viruses
D) plant viruses
2:Virus is a ___entity among living and non-living
A) balanced
B) transitional
C) threshold
D) none of these
3:These viruses usually occur in two structural forms
A) HIV
B) HCV
C) bacteriophage
D) COVID-19
4:The Long chains of HIV-Proteins is cut down by proteases enzyme of ___
A) HIV virus
B) host proteases
C) both viral and host proteases
D) none of these
5:Whenever a virus encounters an unfamiliar organism, the virus may undergo multiple mutations and emerge as a variant that produces
A) severe and novel disease
B) noval disease
C) Mutated
D) none of these
6: Which of the following is the trace element___
A) hydrogen
B) copper
C) oxygen
D) carbon
7: Cooperation of the two photosystems of the chloroplast is required for___
A) ATP synthesis
B) reduction of NADP
C) cyclic photophosphorylation
D) oxidation of the reaction center of photosystem I
8: FADH2 is produced in______
A) glycolysis
B) the oxidation of pyruvates
C) Kreb’s cycle
D) all of these
9: NADPH2 is formed in photosynthesis but in respiration it forms during
A) HMP
B) ETS
C) Kreb’s cycle
D) none of these
10: Succinate is oxidized and formed
A) FAD
B) FADH
C) FADH2
D) NADH2
11: Human accumulated glycogen is an example of
A) phospholipid
B) polysaccharides
C)carbohydrates
D) both b and c
12: The actual replica of chromosome is___ A) Chromatin
B) chromatids
C) centromere
D) polar dyes
13: The high content of which amino acid confers resistance, stability and insolubility to hairs, nails and skin___
A) Glycine
B) alanine
C) methionine
D) cysteine
14:Restriction endonucleases
A) are bacterial enzyme
B) convert RNA to DNA
C) hydrolyze protein into amino acids
D) get mutated for DNA repair
15:Centrifugation is a______
A) process in which samples are spun at high speed
B) efficient process of fabrication
C) slow but excellent process
D) none of these
16: This enzyme is used to cut DNA molecule in rDNA technology
A) ligase
B) phosphatase
C) ribonuclease
D) restriction enzyme
17: Avidin is a protein that
A) binds egg white with biotin
B) binds egg white with egg albumin
C) both a and b
D) this protein do not belong to egg white
18: They are called genetically modified plants containing
A) no gene
B) gene in transposition
C) widely used in gene transfer
D) all of these
19: The type of plastids found in roots of plants _______ .
A) Chloroplasts
B) Chromoplasts
C) Leucoplasts
D) All of them
20: The spent energy in the form of ADP is regenerated by mitochondria into which of the following?
A) AMP
B) ATP
C) ADP
D) all of these
21: Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called? A) active transport
B) passive transport
C) diffusion
D) both b and c
22: An animal has 80 chromosomes in its gametes, how many chromosomes will be seen in the animal’s muscle cells?
A) 120
B) 240
C) 40
D) 160
23: If replication was completely conservative then?
A) one heavy and one light strand would be seen
B) both heavy strands would be seen
C) both light strands would be seen
D) none of these
24: In humans the sequence TTAGGG is repeated how many times?
A) 3000
B) 4000
C) 2500
D) 3500
25: Most protein coding genes are found in?
A) repetitive DNA
B) RNA
C) single copy DNA
D) none of these
26: The molecular basis of sickle cell anaemia was found by?
A) F. Sanger
B) Beadle
C) Tatum
D) Ingram
27: When cocaine is used as a stimulant, it interferes with the CNS at the reuptake of which hormone?
A) testosterone
B) dopamine
C) serotonin
D) adrenaline
28: In the peripheral nervous system, the nerves that arise from spinal cord and brain are called?
A) frontal nerves
B) temporal nerves
C) cranial nerves
D) spinal nerves
29:In the human body, the group formed by neurons enclosed in the membrane at certain body parts is called?
A) benign
B) malign
C) ganglion
D) neuroglial
30: The pea-shaped gland attached to the brain’s hypothalamus is known as?
A) iodopsin glands
B) thyroid gland
C) rhodopsin glands
D) pituitary glands
31:What is the conditions of the neurons under resting membrane potentials?
A) Inner surface of neuron is more positive
B) Both of these surfaces are equally positive
C) Outer surface of neuron is more positive D) all of these
32: The fate of each blastomere is foretold. What will that cleavage be?
A) Spiral and indeterminate
B) Radial and indeterminate
C) Radial and indeterminate
D) Spiral and determinate
33: All of the following coelenterates show alternation of generation except?
A) hydra
B) obelia
C) aurellia
D) all of these
34: Which system is present in nematodes? A) Sac – like digestive system
B) Circulatory system
C) Respiratory system
D) Tube – like digestive system
35: The animals of division Radiata are which of the following?
A) triploblastic
B) diploblastic
C) radioblast
D) all of these
36: Irreversible modifications require the synthesis of which of the following?
A) enzymes
B) carbohydrates
C) vitamins
D) proteins
37: The effect of competitive inhibitor on enzyme activity is such that it affects which of the following?
A) increases enzyme activity
B) doesn’t change enzyme activity
C) decreases enzyme activity
D) none of these
38: Upon increasing the temperature the shape of enzyme’s active site?
A) remains same
B) changes
C) adopts a geometric conformation
D) denatures
39: The optimum pH for enzyme arginase is which of the following?
A) 9
B) 9.3
C) 9.7
D) 10
40: Mating with non-relatives is known as? A) inbreeding
B) outbreeding
C) breeding
D) none of these
41: Natural selection can amplify or diminish variations that are?
A) Heritable
B) non heritable
C) both a and b
D) acquired
42: Who developed a theory of natural selection essentially identical to Darwin’s? A) Hardy-Weinberg
B) Malthus
C) Lamark
D) Alfred Wallace
43: Which condition can be explained by Lamarckism?
A) How giraffes got their long neck
B) How humans lost their tail
C) How humans became bipedal
D) all of these
44: In osmosis water molecules move from area of?
A) Higher solute concentration to lower solute concentration
B) Lower solvent concentration to higher solvent concentration
C) Lower solute concentration to higher solute concentration
D) all of these
45: Midgut in cockroach is a short narrow tube called which of the following?
A) Hepatic caeca
B) rectum
C) stomach
D) gizzard
46: Thick, waxy & leathery cuticle around leaves is present in which of the following? A) Hydrophytes
B) Mesophytes
C) Halophytes
D) Xerophytes
47: There are how many stomata per square cm of leaf surface in Tobacco plants?
A) 10000
B) 12000
C) 15000
D) 20000
48:The maximum amount of oxygen which normal human blood absorbs and carries at sea level is how many ml per 100 ml of blood?
A) 10
B) 20
C) 30
D) 40
49: Who coined the term Animalcules for microorganisms like Bacteria and protozoa?
A) Robert Koch
B) Louis Pasteur
C) Alexander Fleming
D) Leeuwenhoek
50: Cyanobacteria have which of the following type of cell wall?
A) gram positive
B) gram negative
C) cellulose
D) acid fast
51: The process of recombination in prokaryotes takes place in which of the following ways?
A) transformation
B) conjugation
C) transduction
D) all of these
52: In asexual reproduction offspring are produced by which of the following?
A) meiosis
B) mitosis
C) both a and b
D) none of these
53: Fetus is human embryo from the beginning of which of the following?
A) 2nd month
B) 3rd month
C) 4th month
D) 5th month
54: Which of these cycles operate in human females?
A) Oestrous cycle
B) Menstrual cycle
C) both a and b
C) none of these
55: In the male reproductive tract, sperm cells follow a specific path. Which of the following do sperm cells enter after traveling through the epididymis?
A) Urethra
B) Seminiferous tubules
C) Ejaculatory duct
D) Vas deferens
56: What structure marks the separation between two sarcomeres?
A) I band
B) H zone
C) A band
D) Z disc
57: Which of the following is a uni-nucleated cell?
A) skeletal muscle
B) cardiac muscle
C) smooth muscle
D) all of these
58: Why skeletal muscles are called striated muscles?
A) appear darker than smooth muscles by naked eye
B) Alternating dark and light bands appear on their surface when visualized by naked eye
C) Alternating dark and light bands appear on their surface when visualized via a microscope
D) all of these
59: A smallest contractile unit of muscle contraction called sarcomere is the area between two?
A) H zone
B) M line
C) Z line
D) Z zone
60: In the sliding filament theory of muscle contraction, all but which of the following are functions of ATP?
A) ATP does all of these things during muscle contraction
B) It allows the myosin head to detach from the actin filament
C) It moves tropomyosin off of actin binding sites
D) both a and b
61: The alternative forms of same gene is called which of the following?
A) locus
B) gene
C) allele
D) phenotype
62: Homozygous chromosomes include which of the following?
A) diploid cells
B) polyploid cells
C) both a and b
D) none of these
63: The phenomenon in which the effect of one allele in heterozygous genotype completely masks the effect of other is called
A) codominance
B) dominance
C) incomplete dominance
D) complete dominance
64: According to the law of independent assortment, what is the possible number of combinations that chromosomes can assort to independently in the gamete?
A) 16,777,216
B) 2,048
C) 4,194,304
D) 8,388,608
65: Which of the following statement about plants is incorrect?
A) All are eukaryotes
B) They are multicellular.
C) Non-motile organisms
D) Are heterotrophs
66: The space between the overtopped dichotomous branches was occupied by a sheet of which cells during evolution of megaphylls?
A) Sclerenchyma
B) Parenchyma
C) Collenchyma
D) Chlorenchyma
67: What is the name of the structure of the leaf that attaches the leaf to the stem?
A) phloem
B) mesophyll
C) xylem
D) petiole
68: Those fungi which can grow only on their living host and cannot be grown on available defined growth culture medium e.g. various mildews and most rust species are called?
A) Parasitic fungi
B) Facultative parasitic fungi
C) Obligate parasitic fungi
D) all of these
69: Brown algae are also known as which of the following?
A) Rhodophyta
B) Pyrrophyta
C) Chrysophyta
D) Phaeophyta
70: Of the following which one is not the characteristic of green algae?
A) They are generally accepted as the ancestors of green plants
B) Chlorella is unicellular non-motile green algae
C) Some green algae possess cell wall with cellulose
D) none of these
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