Novalgin (Dipyrone) is a well-known analgesic, while the others listed are antibiotics.
Q91mcq
Gause's principle of competitive exclusion states that:
a.
More abundant species will exclude the less abundant species through competition.
b.
Competition for the same resources excludes species having different food preferences.
c.
No two species can occupy the same niche indefinitely for the same limiting resources.
Correct Answer
d.
Larger organisms exclude smaller ones through competition.
Step-by-Step AI Explanation
Verified Method
Gause's Competitive Exclusion Principle states that two species competing for the same limiting resources cannot coexist at constant population values.
Q92mcq
The two polypeptides of human insulin are linked together by:
a.
Hydrogen bonds
b.
Phosphodiester bond
c.
Covalent bond
d.
Disulphide bridges
Correct Answer
Step-by-Step AI Explanation
Verified Method
In mature human insulin, the A and B polypeptide chains are linked together by disulphide bridges (covalent bonds between sulfur atoms of cysteine residues).
Q92mcq
The two polypeptides of human insulin are linked together by :-
a.
Hydrogen bonds
b.
Phosphodiester bond
c.
Covalent bond
d.
Disulphide bridges
Correct Answer
Step-by-Step AI Explanation
Verified Method
Human insulin consists of two polypeptide chains, A and B, which are linked together by interchain disulphide bridges.
Q93mcq
The coconut water from tender coconut represents:
a.
Endocarp
b.
Fleshy mesocarp
c.
Free nuclear proembryo
d.
Free nuclear endosperm
Correct Answer
Step-by-Step AI Explanation
Verified Method
The coconut water found in tender coconuts is a classic example of free-nuclear endosperm, where the primary endosperm nucleus undergoes successive nuclear divisions without wall formation.
Q93mcq
The coconut water from tender coconut represents:-
a.
Endocarp
b.
Fleshy mesocarp
c.
Free nuclear proembryo
d.
Free nuclear endosperm
Correct Answer
Step-by-Step AI Explanation
Verified Method
The coconut water from tender coconut is a classic example of free-nuclear endosperm, where the primary endosperm nucleus undergoes successive nuclear divisions without wall formation.
Q94mcq
Which of the following statements is wrong for viroids?
a.
They lack a protein coat
b.
They are smaller than viruses
c.
They cause infections
d.
Their RNA is of high molecular weight
Correct Answer
Step-by-Step AI Explanation
Verified Method
Viroids consist of a short strand of circular, single-stranded RNA which is of low molecular weight, not high.
Q94mcq
Which of the following statements is wrong for viroids?
a.
They lack a protein coat
b.
They are smaller than viruses
c.
They cause infections
d.
Their RNA is of high molecular weight
Correct Answer
Step-by-Step AI Explanation
Verified Method
Viroids possess a low molecular weight RNA as they are very small compared to viral genomes.
Q95mcq
Which of the following features is not present in the Phylum Arthropoda?
a.
Chitinous exoskeleton
b.
Metameric segmentation
c.
Parapodia
Correct Answer
d.
Jointed appendages
Step-by-Step AI Explanation
Verified Method
Parapodia are lateral outgrowths used for locomotion in Annelida (specifically Polychaetes), not in Arthropoda.
Q95mcq
Which of the following features is not present in the Phylum - Arthropoda ?
a.
Chitinous exoskeleton
b.
Metameric segmentation
c.
Parapodia
Correct Answer
d.
Jointed appendages
Step-by-Step AI Explanation
Verified Method
Parapodia are characteristic structures found in Annelids (like Nereis) for locomotion, not Arthropods.
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Mitochondria and chloroplast are :- (a) semi-autonomous organelles (b) formed by division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery. Which one of the following options is correct?
a.
Both (a) and (b) are correct
b.
(b) is true but (a) is false
c.
(a) is true but (b) is false
d.
Both (a) and (b) are false
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A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of :
In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self-cells, then it leads to :
a.
Allergic response
b.
Graft rejection
c.
Auto-immune disease
d.
Active immunity
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Match the terms in Column-I with their description in Column-II and choose the correct option : Column-I (a) Dominance (b) Codominance (c) Pleiotropy (d) Polygenic inheritance Column-II (i) Many genes govern a single character (ii) In a heterozygous organism only one allele expresses itself (iii) In a heterozygous organism both alleles express themselves fully (iv) A single gene influences many characters
a.
(1) (ii) (i) (iv) (iii)
b.
(2) (ii) (iii) (iv) (i)
c.
(3) (iv) (i) (ii) (iii)
d.
(4) (iv) (iii) (i) (ii)
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Pick out the correct statements : (a) Haemophilia is a sex-linked recessive disease (b) Down's syndrome is due to aneuploidy (c) Phenylketonuria is an autosomal recessive gene disorder. (d) Sickle cell anaemia is a X-linked recessive gene disorder
a.
(a) and (d) are correct
b.
(b) and (d) are correct
c.
(a), (c) and (d) are correct
d.
(a), (b) and (c) are correct
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Pick out the correct statements:
(a) Haemophilia is a sex-linked recessive disease
(b) Down's syndrome is due to aneuploidy
(c) Phenylketonuria is an autosomal recessive gene disorder.
(d) Sickle cell anaemia is a X-linked recessive gene disorder
a.
(a) and (d) are correct
b.
(b) and (d) are correct
c.
(a), (c) and (d) are correct
d.
(a), (b) and (c) are correct
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A plant in your garden avoids photorespiratory losses, has improved water use efficiency shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?
a.
C3
b.
C4
c.
CAM
d.
Nitrogen fixer
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A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures, and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?
a.
C3
b.
C4
c.
CAM
d.
Nitrogen fixer
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Following are the two statements regarding the origin of life: (a) The earliest organisms that appeared on the earth were non-green and presumably anaerobes. (b) The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of the following options is correct?
a.
(a) is correct but (b) is false.
b.
(b) is correct but (a) is false.
c.
Both (a) and (b) are correct.
d.
Both (a) and (b) are false.
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Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options :-
a.
Both processes cannot happen simultaneously.
b.
Both processes can happen together because the diffusion coefficient of water and CO2 is different.
c.
The above processes happen only during night time.
d.
One process occurs during day time, and the other at night.
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A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in :-
a.
Aneuploidy
b.
Polyploidy
c.
Somaclonal variation
d.
Polyteny
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