set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 5 EXERCISES
The following question based on genetics, evolution of life & ecological biodiversity topic of general science mcq
- Sickle cell anaemia is a genetic disease common in tropical and sub-tropical countries.
- Sickle-cell anaemia is due to mutation in β-globulin gene.
- Due to the sickle-shaped RBCS oxygen carrying capacity of the haemoglobin decreases.
(a) 2 and 3
(b) 1, 2 and 3
(c) 1 only
(d) 3 only
The correct answers to the above question in:
Answer: (b)
Due to mutation in the b-globulin gene of haemoglobin, the oxygen carrying capacity of RBCs decreases considerably, eventually causing sickle cell andaemia.
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Read more genetics evolution of life and ecological biodiversity Based General Science Questions and Answers
Question : 1
Which is not a stem modification ?
a) Pitcher of Nepenthes
b) Rhizome of ginger
c) Corm of Colocasia
d) Tuber of potato
Answer »Answer: (a)
Question : 2
All producers are
a) All autotrophs
b) Food making organisms
c) Make food in the presence of sunlight with chlorophyll
d) All the above
Answer »Question : 3
Which of the following groups of plants play an important role in plant succession on bare rocks/soil?
a) Pteridophytes
b) Algae
c) Bryophytes
d) Gymnosperms
Answer »Answer: (d)
Question : 5
The famous botanical garden ‘Kew’ is located in
a) Berlin
b) England
c) Lucknow
d) Australia
Answer »Answer: (b)
Question : 6
Consider the following statements :
- Polytene chromosomes found in salivary gland of larva of Drosophila and Chironomus larva.
- They were Discovered by Balbiani.
- They were characterized by presence of puffs and Balbiani rings
- These chromosomes are attached by chromocentre.
a) 2 only
b) 2 and 3
c) 1 and 2
d) 1, 2, 3 and 4
Answer »Answer: (d)
Polytene chromosomes are over-sized chromosomes which have developed from standard chromosomes and are commonly found in the salivary glands of Drosophila melanogaster. These were originally observed in the larval salivary glands of Chironomus midges by Balbiani in 1881. Many balbiani rings and puffs are a part of these chromosomes.
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