MCAT topic based MCQs preparation test for all competitive exam. MCAT Chapter# 22, topic based MCQs that are mostly asked in competitive exam related to Biology. Examtry team design a series of MCQs based tests that effectively and efficiently help a student or job seeker to prepare their exam effectively and efficiently.
Examtry team design more than 80 MCQs and try their best to cover the whole topic MCAT . These MCQs based test really helpful in all competitive exams as well as institutional exams. Anyone who wants to pass job test comprising one paper or MCQs based test come on examtry.com and get prepared himself.
MCQs under the topic of MCAT covers all tests conducted by Medical Entry test Institutions.
1 - Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called
Biochemistry
2 - _______ is the potential surce of chemical energy for cellular activities
C-H bond
3 - Percentage of water in brain cells is
0.85
4 - Breakdown of large molecules into smaller ones utilizing water molecules is
Hydrolysis
5 - A chemical substance that reacts with enzyme but is not transformed into product and thus blocking active site is called
Inhibitor
6 - Intake of liquid material by cell membrane is called
Pinocytosis
7 - Ribosomes were discovered by
Palade
8 - _______ is concerned with cell secretions
Golgi complex
9 - Cytoskeleton involved in assembly and disassembly of the spindle during mitosis is of
Microtubules
10 - Reverse transcriptase is present in
All retroviruses
11 - Pox viruses are
DNA enveloped
12 - Bacteria which grow either in the presence or absence of oxygen
Facultative bacteria
13 - Destruction of all life forms is called
Sterilization
14 - _______ is used to relieve one kind of headache, migraine
Ergotin
15 - The single healthy megaspore retained within the megasporangium germinates to form an egg containing female gaemtophyte called
Embroyo sac
16 - Pollen grains in pinus have _____ for dispersal through wind
Wings
17 - Double fertilization is feature of
Angiosperms
18 - Alternation of generations is absent in
Hydration
19 - Enterobius vermicularis is commonly known as
Pinworm
20 - Animals of which class of arthropoda are present everywhere
Insecta
21 - Amphibians are considered to be evolved from
Dipnoi
22 - Red to orange pigments are
Carotenes
23 - NADH is oxidized by
Coenzyme ?
24 - Salivary glands present in front of ear are
Parotid
25 - If bile pigments are prevented from leaving digestive tract, then they cause
Jaundice
26 - How many spiracles are present in cockroach
20
27 - Gaseous exchange in birds occurs at level of
Parabronchi
28 - An infectious disorder of respiratory system is
Tuberculosis
29 - According to cohesion-tension theory, tension is created by
Transpiration
30 - Cuticular transpiration is _______ of total transpiration
5-7%
31 - _______ cells of phloem are directly involved in transport of organic solutes
Sieve element
32 - Deoxygenated blood first enters in _____ part in fishes
Sinus venosus
33 - 95% of the cytoplasm of RBCs is
Hemoglobin
34 - lubb sound is produced due to
Closure of inlet valve
35 - An antibody is made of _____ polypeptide chains
4
36 - _______ of earth surface is covered with water
0.75
37 - Ozone depletion occurs commonly due to
Chlorofluorocarbons
38 - The productivity of aquatic ecosystem is basically determined by light and
Nutrients
39 - Ecosystem not found in Pakistan is
Tropical rain forest
40 - Annual rainfall in grassland is about
250-750 mm
41 - Which of the following is most constant abiotic component of ecosystem
Gravity
42 - Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due to
Nitrosomonas
43 - _______ supported theory of special creation
Linnaeus
44 - In Hardy-Weinberg formula P2 represents frequency of
Homozygous dominant individual
45 - Humming bird is an example of
Heterotherm
46 - In condition of high temperature, following does not occur or occurs at low level
Thermogenesis
47 - Sapwood is formed from
Secondary xylem
48 - Number of cervical vertebrae is
7
49 - Joints present in skull are example of
Fibrous joints
50 - Only myosine is present in
H zone
51 - __________ is a nervous disorder characterized by involuntary tremors, diminished motor power and rigidity.
Parkinson's disease
52 - Which of the following hormone is polypeptide in nature
ADH
53 - Secretin inhibits production of
Gastric juice
54 - Highest form of learning is
Insight learning
55 - Far-red light promotes flowering in
Short day plant
56 - In human female, fertilization commonly occurs at
Proximal part of oviduct
57 - Yellowish glandular structure which produces progesterone is
Corpus luteum
58 - Yellow cytoplasm in ascidian gives rise to
Muscle cells
59 - Embryonic induction is caused by part developing from
Mesoderm
60 - Okazaki fragments are connected together through action of
Ligase
61 - Sickle cell anemia is an example of
Point mutation
62 - Which of the following is an autosomal disorder
Down's syndrome
63 - Test cross is used to find
Genotype
64 - An example of codominance is
AB' blood group
65 - XO-XX pattern of sex determination is present in
Grasshopper
66 - Tibia is a bone found in the ____________?
Leg
67 - Which is the largest gland in the human body?
Liver
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