There is a restriction endonuclease called EcoRI. What does co. part in it stand for ?
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Solution
EcoRI is an endonuclease enzyme isolated from strains of E.coli and a part of restriction modified system. So co part stands for coli.
Phellogen and phellem respectively denote
R.Q. for glucose (Carbohydrates) is
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Solution
Which of the following test will you perform to demonstrate the presence of gibberellin ?
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Solution
Bolting of cabbage can be induced artificially by the application of gibberellin under conditions that would normally maintain the rossette form.
Which of the following ion is necessary for the contraction of a muscle and nerve impulse transmission?
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Solution
Ca++is an essential element for the contraction of musclesbecause release of Ca++ions from sarcoplasmic reticulum trigger the muscle contraction process.
In electron transport system (ETS), which of the following cytochrome reacts with oxygen ?
The following ratio is generally constant for a given species:
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Solution
According to Chargaff purines and pyrimidines are in equal amounts. Purine (adenine) is equimolar with pyrimidine (thymine) and purine (guanine) is equimolar with pyrimidine (cytosine). Base ratio is specific for species.
In a particular plant, two genes control leaf shape and color. Round leaves (R) are dominant to jagged leaves (r). Yellow fruits (Y) are dominant to white fruits (y). A true-breeding round-leaved, yellow-fruited plant is mated with a jagged-leaved, white-fruited plant. What are the genotypes of the plants involved in this cross ?
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Solution
“True-breeding” in this case means homozygous for both traits, with the parents of opposite phenotypes.
Which of the following species is endangered ?
Which of the following is not a part of forebrain ?
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Solution
Rhombencephalon refers to the hindbrain.
When a plant is not reproducing most of the cytokinins are produced in its :
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Solution
The ratios of cytokinins to auxins control cell differentiation in plant tissue culture. If there is more of cytokinin than auxin shoot buds develop from a callus.If there is relatively more auxin than cytokinins roots develop.
Which of the following is the correct direction of travel for a nervous impulse?
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Solution
Dendrites collect impulses and carry them toward the nerve cell bodies. Axons then pick up the integrity of the signal and speeds transmission along the axon.
Norepinephrine :
(1) Is released by sympathetic fibres
(2) Is released by parasympathetic fibres
(3) Increases the heart rate
(4) Decreases blood pressure
Which of the above said statements are correct?
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Solution
Norepinephrine is released by sympathetic fibres i.e,rapidly secreted in response to stress of any kind and during emergency situations. It increases the heart beat,the strength of heart contraction and the rate of respiration.
CAM plants differ from C4 plants in that
A lawyer tells a male client that blood type cannot be used to his advantage in a paternity suit against the client because the child blood, in fact, be the client’s, according to blood type. Which of the following is the only possible combination supporting this hypothetical circumstance ?
(Answers are in the order mother : father:child)
Heart is three – chambered in reptiles, exception is –
Which bacteria converts NO2 to NO3?
Which of the following is the first thing that happens when a signal molecule acts on a target cell?
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Solution
The first effect of any signal molecule must involve the binding of the molecule to a receptor.
During the post-fertilisation period the ovules develop into__________ and the ovary matures into a _________.