set 6 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 6 EXERCISES
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The following question based on physiology of plants, humans and animals topic of general science mcq
- Synapsis of homologous chromosomes takes place during prophase I of meiosis.
- Division of centromeres takes place during anaphase I of meiosis.
- Spindle fibres disappear completely in telophase of mitosis.
- Nucleoli reappear at telophase I of meiosis.
(a) 1 and 2
(b) 3 only
(c) 1 only
(d) 1, 3 and 4
The correct answers to the above question in:
Answer: (d)
Division of centromeres takes place during Anaphase II of meiosis.
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Read more biology Based General Science Questions and Answers
Question : 1
Nervous tissue is not found in
a) spinal cord
b) brain
c) tendons
d) nerves
Answer »Answer: (c)
Question : 2
Bryophytes are photosynthetic but do not have vascular tissue and true roots. This feature enable them to resemble with which of the following?
a) Pteridophytes
b) Fungi
c) Algae
d) Angiosperms
Answer »Answer: (c)
Like algae, bryophytes are nonvascular. True roots, leaves and stems are also missing.
This similarity has caused scientists to regard the bryophyte as an intermediary in the evolution from algae to land plants.
Question : 3
Air is breathed through
a) Nose — larynx — pharynx — bronchus — alveoli — bronchioles
b) Trachea — lungs — larynx — pharynx — alveoli
c) Nostrils — pharynx — larynx — trachea — bronchi — bronchioles — alveoli
d) Nose — mouth — lungs
Answer »Answer: (c)
The pathway of inhaled air is -
Nostrils - pharynx (common passage for food & air) - larynx (voice box) - trachea (the windpipe) - bronchi (2 for each side lungs) - bronchioles (give rise to alveolar ducts) - alveoli (the exchange site for gases in the form of small sacs or pouches).
Question : 4
Pneumatic bones of birds
a) increase the $CO_2$ output
b) increase the heart beat rate
c) increase the respiratory rate
d) increase the buoyancy
Answer »Answer: (d)
Pneumatic bones in birds help in increasing buoyancy which eventually help them in flying by decreasing bone density.
Question : 5
What wasthe mostsignificant conclusion that Gregor Mendel drew from his experiment with pea plant?
a) Recessive genes occur more frequently in the F1 than do dominant ones.
b) There is considerable genetic variation is garden peas.
c) Traits are inherited in discrete units, and are not the results of “blending”.
d) Genes are composed of DNA.
Answer »Answer: (c)
Greger Mendel proposed that traits are transferred not as blended but in discrete units which be called "factors".
Question : 6
Match Column-I with Column-II and select the correct answer using the code given below the lists.
Column-I | Column-II |
A. Auxin | I. Fruit ripening |
B. Cytokinins | II. Apical dominance |
C. Abscisic acid | III. Antagonist to GAS |
D. Ethylene | IV. Stomatal opening and closing |
V. Growth of lateral buds |
a) A-II; B-IV; C-III, IV; D-I
b) A-IV; B-V; C-III; D-I
c) A-II; B-V; C-III, IV; D-I
d) A-III, IV; B-V; C-II; D-I
Answer »Answer: (c)
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