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
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
The correct answers to the above question in:
Answer: (c)
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Read more biology Based General Science Questions and Answers
Question : 1
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 : 2
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 : 3
Which of the following statement(s) is/are true?
- 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
Answer »Answer: (d)
Division of centromeres takes place during Anaphase II of meiosis.
Question : 4
Which one among the following is the hardest part of our body ?
a) Thumb nails
b) Skull bones of head
c) Enamel of teeth
d) Spinal vertebra
Answer »Answer: (c)
Question : 5
Which of the following statements are incorrect?
- Aves are cold-blooded, egg-laying and have four-chambered hearts.
- Aves have feather-covered bodies, forelimbs are modified as wings and breathe through lungs.
- Most mammals are viviparous. 4. Fishes, amphibians and reptiles are oviparous.
a) 1 and 4
b) 1, 2 and 3
c) 1 and 3
d) All of these
Answer »Answer: (a)
Aves are warm-blooded, egg-laying and have a four-chambered heart. Amphibians and reptiles are oviparous but in super class Pisces, 2 classes Chondrichthyes and Osteichthyes are present where Chondrichthyes have internal fertilisation and many of them are viviparous and Osteichthyes are mostly oviparous and development is direct.
Question : 6
Various functions like photosynthesis, storage, excretion performed by _____________.
a) parenchyma
b) sclerenchyma
c) collenchyma
d) aerenchyma
Answer »Answer: (a)
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