Cellulose, the most important constituent of plant cell wall is made of                     [1998]

(a) Unbranched chain of glucose molecules linked by α 1, 4-glycosidic bond

(b) Branched chain of glucose molecules linked by β 1, 4-glycosidic bond in straight chain and α, 1, 6-glycosidic bond at the site of branching

(c) Unbranched chain of glucose molecules linked by β 1, 4-glycosidic bond

(d) Branched chain of glucose molecules linked by α 1, 6-glycosidic bond at the site of branching

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Cytochrome is                          [2001]

(a) Metallo flavoproteins

(b) Fe containing porphyrin pigment

(c) Glycoprotein

(d) Lipid 

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The most abundant element present in plants is                               [2004]

(a) Carbon

(b) Nitrogen

(c) Manganese

(d) Iron

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Transition state structure of the substrate formed during an enzymatic reaction is                                                                                                                                                                [2013]

(a) Transient but stable

(b) Permanent but unstable

(c) Transient but unstable

(d) Permanent and stable

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which one of the following is a non-reducing carbohydrate?                                [2014]

(a) Maltose

(b) Sucrose

(c) Lactose

(d) Ribose-5-phosphate

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Antiparallel strands of a DNA molecule means that                      [2006]

(a) The phosphate groups of two DNA strands, at their ends, share the same position

(b) The phosphate groups at the start of two DNA strands are in opposite position (pole)

(c) One strand turns clockwise

(d) One strand turns anti-clockwise 

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In the DNA molecule                 [2008]

(a) The total amount of purine nucleotides and pyrimidine nucleotides is not always equal

(b) There are two strands which run parallel in 5'3' direction

(c) The proportion of adenine in relation to thymine varies with the organism

(d) There are two strands which run antiparallel one in 5'3' direction and other in 3'5' direction 

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The major portion of the dry weight of plants comprises of                  [2003]

(a) Carbon, nitrogen and sulphur

(b) Carbon, nitrogen and oxygen

(c) Nitrogen, phosphorous and potassium

(d) Calcium, magnesium and sulphur

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Select the option which is not correct with respect to enzyme action.                                [2014]

(a) Substrate binds with enzyme as its active site

(b) Addition of lot of succinate does not reverse the inhibition of succinic dehydogenase by malonate.

(c) A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate

(d) Malonate is a competitive inhibitor of succinic dehydrogenase

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Two free ribonuleotide units are interlinked with                                [1995]

(a) Peptide bond

(b) Covalent bond

(c) Hydrogen bond

(d) Phosphodiester bond

Please attempt this question first.

Difficulty Level: