Multiple Choice QuestionsMost animals that live in deep oceanic waters are
tertiary consumers
detritivores
primary consumers
secondary consumers
In a 3.2 Kbp long piece of DNA, 820 adenine bases were found. What would be the number of cytosine bases?
780
1560
740
1480
Match column I with column II and select the correct option from codes given below.
| Column I | Column II |
| Brassica | Himgiri |
| Okra | Pusa Komal |
| Wheat | Pusa Gaurav |
| Cowpea | Pusa Sawani |
A - (iii), B - (iv), C- (i), D- (ii)
A - (i), B - (iii), C - (ii), D - (iv)
A - (iv), B - (iii), C - (i), D - (ii)
A - (ii), B - (iv), C - (i), D - (iii)
Some of the steps of DNA fingerprinting are given below. Identify their correct sequence from the options given.
A. Electrophoresis of DNA fragments
B. Hybridisation with DNA probe
C. Digestion of DNA by restriction endonucleases
D. Autoradiography
E. Blotting of DNA fragmentsto nitrocellulose membrane
C - A - B - E - D
C - A - E - B - D
A - E - C - B - D
A - C - E - D - B
B.
C - A - E - B - D
The technique of DNA fingerprinting involves following steps:
(i) Isolation of DNA from sample cell
(ii) Amplification of DNA using Polymerase Chain Reaction (PCR), (if DNA is less in amount).
(iii) Digestion of this DNA by restriction endonucleases (C)
(iv) These DNA fragments are electrophoresed in agarose gel. These fragments can be visualised using EtBr - UV system (A)
(v) Separated DNA fragments are transferred to nitrocellulose membrane using Southern Blotting (E).
(vi) Probing for VNTRs is done using labelled DNA probes (B).
(vii) The hybridised fragment can be detected by autoradiography (D).
One of the following statements is incorrect with reference to biodiversity. Identify it.
The areas with very few plant and animal species (low species richness) with no threatened species are called biodiversity hotspots.
Biodiversity increases from higher altitudes to lower altitudes
Biodiversity decreases from the equator to polar regions
Depletion in genetic diversity of crop plants is mainly due to the introduction of better varieties with high yield, disease resistance, etc.
Tetradynamous condition is found in
Hibiscus rosa-sinesis
Ocimum sanctum
Helianthus annuus
Brassica campestris
Which of the following represents the action of insulin?
Increases blood glucose level by stimulating glucagon production
Decreases blood glucose level by forming glycogen
Increases blood glucose level by promoting cellular uptake of glucose
Increases blood glucose level by hydrolysis of glycogen
If the sequence of bases in the coding strand of a double stranded DNA is 5'-GTTCGAGTC-3', the sequence of bases in its transcript will be
5'-GACUCGAAC-3'
5'-CAAGCUCAG-3'
5'-GUUCGAGUC-3'
5'-CUGAGCUUG-3'
One greenhouse gas contributes 14% to total global warming and another contributes 6%. These are respectively identified as
N2O and CO2
CFCs and N2O
methane and CO2
methane and CFCs
The following is the diagram of T.S. of anther. Identify the parts labelled A, B and C.
A- Connective tissue, B- Pollen grain, C- Endothecium
A- Endothecium, B- Connective tissue, C- Pollen grains
A- Pollen grains, B- Connective tissue, C- Endothecium
A- Endothecium, B- Pollen grains, C- Connective tissue
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