Multiple Choice QuestionsMost animals that live in deep oceanic waters are
tertiary consumers
detritivores
primary consumers
secondary consumers
B.
detritivores
Benthos is the community of organisms which live on, in, or near the sea bed, also known as the benthic zone. As no light is available in this zone of sea, the energy source for deep benthic ecosystem is often organic matter from higher water column which drifts down to the depths. This dead and decaying matter sustains the benthic organisms, and therefore, most organisms in benthic zone i.e., in deep oceanic waters, are scavengers or detritivores.
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
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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