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| Biology MCQs For Entry Test Preparation (Chapter Wise) || Important Biology MCQs For Entry Test || MDCAT Biology Test Online Preparation MCQs with Answers |
1- The most abundant
protein in animals is?
a)
Rubisco
b) Collagen
c)
Hemoglobin
d)
Albumin
2- Support is provided
to the human body by?
a)
Muscle
b)
Bone
c)
Cartilage
d) All of the above
3- The number of bones in the rib cage is?
a)
22
b)
24
c) 25
d)
26
4- Which one of the following is associated with the gland?
a)
Mandible
b) Lacrimal bone
c)
Maxilla
d)
Nasal bone
5- The functional unit of
muscles in the human body?
a)
Muscle fibre
b) Sarcomere
c)
Both
d)
None
6- The structural unit of
muscle is?
a) Muscle fibre
b)
Sarcomere
c)
Both
d)
None
7- The most abundant protein
in plasma is?
a)
Rubisco
b)
Collagen
c) Albumin
d)
Hemoglobin
8- Which one of the following
is the oxygen-carrying protein?
a)
Albumin
b) Myoglobin
c)
Hemoglobin
d)
Collagen
9- The most abundant
protein on earth is:
a) Rubisco
b)
Collagen
c)
Myoglobin
d)
Hemoglobin
10- Cardiac muscles are?
a)
Voluntary
b) Involuntary
c)
Both
d)
None
11- Which one of the
following is inside the nose?
a) Inferior concha
b)
Mandible
c)
Lacrimal
d)
Maxilla
12- How many ribs are
attached to the vertebral column?
a)
12 ribs
b) 12 pairs
c)
24 ribs
d)
24 pairs
13- Which one of the
following is vestigial bone?
a)
Sacrum
b) Coccyx
c)
Pubis
d)
Femur
14- The most abundant
vertebra is?
a)
Pelvic
b)
Lumbar
c) Thoracic
d)
Cervical
15- Myoglobin is present
in ____ of skeletal muscle fibre?
a)
Sarcoplasmic reticulum
b)
Nucleus
c)
Sarcolemma
d) Sarcoplasm
16- All or none response
is based upon?
a)
All muscle fibers participate in contraction
b)
All myofilaments contracts together
c) All myofibrils contract together
d)
The whole muscle bundle participates in
contraction
17- To bend the arm at
the elbow joint, which of the following occurs?
a) Biceps contract, triceps relax
b)
Biceps relax, triceps contract
c)
Brachialis contracts, brachioradialis relaxes
d)
Brachialis relaxes, brachioradialis contracts
18- Tetanus is caused by?
a)
Low calcium level
b)
Aerobic bacterium
c) Anaerobic bacterium
d)
Virus
19- Muscle fatigue causes?
a)
Accumulation of lactic acid
b)
Ionic imbalance
c)
pH drop
d) All of the above
20- Deficiency of ATP
causes?
a)
Twitches
b)
Convulsions
c) Contractures
d)
Spasm
21- Troponin is involved
in?
a)
Binding with actin
b)
Binding with calcium ions
c)
Binding with tropomyosin
d) All of the above
22- Each myosin is
surrounded by ___ actin filaments.
a)
5
b) 6
c)
7
d)
9
23- The protein of bones
and cartilage is called?
a)
Keratin
b) Collagen
c)
Globulin
d)
Albumin
24- During the
development when the cartilage is replaced by the bones, ___ cells take part in
dissolving.
a)
Osteoblasts
b) Osteoclasts
c)
Osteocytes
d)
Stem cells
25- During muscle
contraction?
a) Z-line gets closer
b)
I-band elongates
c)
A-band gets short
d)
There is no change in sarcomere
26- After binding of Ca2+
with troponin molecule during muscle contraction, the next step is?
a)
Binding sites of actin get attached to the
myosin head
b)
Ca2+ goes back inside the sarcoplasmic reticulum
c)
Troponin uncovers the actin-binding sites
d) Tropomyosin gets removed from the
binding sites of actin filaments
27- 2 globular heads,
cross bridges, tail comprising of 2 long polypeptide chains, this is the
structure of?
a) Thick filament
b)
Thin filament
c)
Sarcomere
d)
Actin filament
28- Which of the
following is not the part of thin filament?
a)
Actin
b) Myosin
c)
Troponin
d)
Tropomyosin
29- The sarcomere is the area
between two __?
a)
M line
b) Z line
c)
H zone
d)
I band
30- Energy in muscle contractions
is obtained in the form of?
a)
Creatinine phosphate
b)
ATP
c)
NADPH
d) Only a and b
e)
All of the above
31- Which of the
following is not a ball and socket joint?
a) Knee joint
b)
Hip joint
c)
Shoulder joint
d)
None
32- A pivot joint exists
between?
a)
Tibia and fibula
b)
Humerus and ulna
c) Ulna and radius
d)
Humerus and scapula
33- Which of the following
is not a freely moveable joint?
a) Pivot joint
b)
Hinge joint
c)
Ball and socket joint
d)
None
34- Fibrous joints are
held together by short fibres embedded in connective tissue and are present in?
a)
Skull
b)
Teeth and jaws
c) Both
d)
None
35- Hinge joints allow movement
in?
a) Two directions
b)
Multi-directions
c)
None
36- _____ joints contain
a cavity filled with fluid?
a) Synovial joints
b)
Cartilaginous joints
c)
Fibrous joints
37- Cartilage is not
present in?
a)
Nose
b)
Ears
c)
Epiglottis
d) None
38- Hyaline cartilage is
found at?
a)
Ears
b) Joints
c)
Nose
d)
Epiglottis
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