In a normal adult, ascending order of concentration of following molecules is

• K>Na>Fe>Cu

• Na>K>Cu>Fe

• Fe> Na> K > Cu

• Na> Fe> K > Cu

82.

Select the option having all correctly matched pairs.
A. Alkaloids (i) Carotenoid; Anthocyanin
B. Pigments (ii) Vinblastin; curcumin
C. Drugs (iii) Morphine; Codeine

• A-i; B-ii;C-iii

• A-ii; B-iii; C-i

• A-iii; B-i; C-ii

• A-i; B-iii; C-ii

Assertion: Excess Mn in soil, can adversely decrease Mg, Fe and Cu concentrations in the soil.

Reason: Mn increases rate of photosynthesis, thereby increasing absorption of Mg, Fe and Ca from soil.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false

Assertion : All proteinecous enzymes have a three-dimensional structure.

Reason : The secondary structure of protein is according to amino acid present inside the polypeptides.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are hue but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Glutamine contains amide group.

Reason : Isoelectric point of glutamine is 7.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are hue but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Vitamin B₆ is also called

• thiamine

• pantothenic acid

• pyridoxine

• retinol

What do A, B, C and D represent in the following figure?

• A : carrier protein, B: symport, C: uniport, D : antiport

• A : carrier protein, B : uniport, C: antiport, D : symport

• A: carrier protein, B: antiport, C: symport, D : uniport

• A : carrier protein, B: uniport, C: symport, D : antiport

Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?

• Morphine

• Valium

• Amphetamines

• Hashish

Which of the following elements is present in very less quantity in the body

• K

• Ca

• Mg

• Cu

Assertion: Enzymes lower down the activation energy of the reactant molecule to make its transition into product easier.

Reason: Enzymes are highly substrate specific catalysts.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.