List of top Physical Sciences Questions

Contaf is a trade name of:

(A). Enzymes enhance reaction rate by a factor of 2 to 10
(B). Activation energy of a reaction is lowered by enzymes
(C). Interactions between enzymes and substrates are hydrogen, ionic and hydrophobic bonds
(D). Substrate concentration does not affect the rate of enzyme-catalyzed reactions
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Which of the following statements is correct?
(A). Allosteric enzymes don't obey Michaelis mentioned kinetics
(B). Some regulatory enzymes are modulated by reversible covalent modification
(C). Allosteric enzymes undergo reversible covalent modification
(D). Reversible covalent modification caused by phosphorylation
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Match List-I with List-II

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Match List-I with List-II

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Chilling resistant plants have more percentage of:

A useful measure of the photosynthetic efficiency of plants is:

Given below are two statements, one is labeled as Assertion (A), and the other one is labeled as Reason (R).
Assertion (A): 2 Proline is an aromatic amino acid as it has a ring structure.
Reason (R): Aromatic amino acids have a benzene ring of its derivative side chain structures.
In light of the above statements, choose the most appropriate answer from the options given below.

Which of the following can have a quaternary structure:

Which one of the following is a nucleoside?

Die back of citrus is due to deficiency of:

Given below are two statements, one is labeled as Assertion (A), and the other one is labeled as Reason (R).
Assertion (A): Alcohols are weaker acids than water.
Reason (R): Water is a better proton donor than alcohol.
In light of the above statements, choose the most appropriate answer from the options given below.

All the following molecules contain more than one ring except:

All of the following are storage carbohydrates except:

Boron regulates
(A).Ribosomal fraction
(B).Translocation of sugars
(C).Carbohydrate metabolism
(D).Calcium metabolism
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Match List-I with List-II

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Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Weathering produces minerals which is assigned with a weathering index.
Reason (R) : The sequence of weathering is largely controlled by intensity and capacity factor as a fraction of time.
In light of the above statements, choose the correct answer from the options given below.

Lecithin is the common name of:

Match List-I with List-II

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Match List-I with List-II

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Given below are two statements:
Statement (I):Translocation of sugars is increased in K deficient plants
Statement (II):Potassium is taken by crops as chelates from the soil solution
In light of the above statements,choose the most appropriate answer from the options given below.

Given below are two statements:
Statement (I):High Cu in soil causes Fe chlorosis in citrus
Statement (II):Application of potassium increases Mn & Fe content in rice
In light of the above statements,choose the most appropriate answer from the options given below.

Arrange the minerals in the order of increasing weathering index
(A).Quartz
(B).Gypsum
(C).Haematite
(D).Allophane
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Find out the value of pF when there is a tension head of 100 cm of water:

Growth factor necessary to produce yield that is 50% of the difference between maximum possible yield and yield before that unit was applied was given by ------
(A).Mitscherlich & Bray
(B).Mitscherlich & Baule
(C).Baule only
(D). Baule, Arnon & Bray
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