biology MCQs – Page 37

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
721. Specialized protective coverings around megasporangium which vary in number are called_________________?
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A. Sporangium

B. Integuments

C. Ovule

D. Pericarp

722. Vocal cords are stretched across_______?
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A. Larynx

B. Pharynx

C. Golttis

D. None of these

723. Respiratory distress syndrome is common especially for infants with a__________?
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A. Less than 8 month

B. Less than 9 month

C. More than 9 month

D. Less than 7 month
724. Lungs are covered with double layered thin membranous sac called___________?
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A. Disphragm

B. Pleura

C. Rib cage

D. Pericardium

725. Which of the following promotes growth in plants?
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A. Photorespiration

B. Calvin cycle

C. Both of these

D. None of these

726. In life cycle of Pinus megaspores produced by megasporangium divide into 4 megaspores by__________________?
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A. Mitosis

B. Meiosis

C. Both depending upon the conditions

D. None of these

727. During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human?
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A. 5?10

B. 15-20

C. 16-30

D. 6?12

728. Fibrous capsule surrounding synovial joints may be thickened at some places to form:
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A. Synovial membrane.

B. Muscles.

C. Ligaments.

D. Tendon

729. Which of the following statement about neuron is incorrect___________________?
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A. They not only conduct impulses but also generate them

B. They may show limited regenerative capabilities

C. Like all the living cell, when they mature and divide to form similar cells

D. They are not the only cellular component of nervous system

730. Number of spiracles present in the thorax of cockroach is___________?
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A. 3

B. 5

C. 4

D. 2

731. The air spaces may comprise upto _________ of total volume of leaf surface?
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A. 40%

B. 50%

C. 30%

D. 20%

732. Bony callus formation completes in___________?
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A. 2-3 weeks

B. 3-4 weeks.

C. 3-4 months.

D. 2-3 months.
733. Bacteriochlorophylls does not include________________?
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A. Chlorophyll a

B. Chlorophyll e

C. Chlorophyll d

D. Chlorophyll c

734. How many bones are present in the wrist?
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A. 4 bones

B. 14 bones

C. 8 bones

D. 6 bones

735. Which of the following vertebrates have a fish-like body?
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A. Reptiles

B. Amphibians

C. Mammals.

D. Aves

736. Active site of Rubisco is evolved to bind?
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A. All of these

B. O2

C. CO2

D. H2O

737. Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency?
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A. Hypocalcaemia Tatanic spasms.

B. Osteomalacis.

C. Rickets.

D. Tetany

738. The zygote formed in liverworts is___________?
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A. Mulicellular

B. Multinucleate

C. Unicellular

D. None of these

739. Insulin and glucagons are __________ in nature.
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A. Amino acid derivative

B. Protein

C. Steroid

D. Polypeptide

740. Number of spiracles present in cockroach is___________?
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A. 20

B. 10

C. 30

D. 15