List of top Plant Biotechnology Questions on Biochemistry

Match List-I with List-II

List-I (Name of the lipid) & List-II (Nature of the lipid)
(A) Ceramide & (III) Structural parent of all sphingolipids
(B) Cerebroside & (IV) Neutral Glycosphingolipid
(C) Ganglioside & (II) Acidic (charged) glycosphingolipid
(D) Platelet Activating Factor & (I) Ether glycerophospholipid

Match List-I with List-II

List-I (Name of the component) & List-II (Vitamin/Coenzyme)
(A) Pantothenic acid & (II) Coenzyme A
(B) Para-Amino Benzoic Acid (PABA) & (III) Folic acid
(C) Ribose & (I) NAD
(D) Pentanoic acid & (IV) Lipoic acid

Match List-I with List-II

List-I (Mineral) & List-II (Deficiency Symptom)
(A) Manganese & (IV) Poor wound healing due to the inactivation of Prolidase
& enzyme
(B) Selenium & (III) Enhanced oxidative stress
(C) Magnesium & (II) Poor Vitamin D status due to lesser formation of biologically
& active form of Vitamin D
(D) Molybdenum & (I) Neurological abnormalities due to sulfite oxidase deficiency

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : The free histidine is a dominant buffering system at physiological pH than the protein-bound or dipeptide histidine.
Reason (R) : In proteins or dipeptides, the imidazole pKa decreases substantially-in combination with other amino acids- to a level which is more than 1 pH unit removed from intracellular pH.
Which of the following interventions would result in enhanced chromatographic separation?
(A) Increasing the number of theoretical plates
(B) Decreasing the Height Equivalent to a Theoretical Plate (HETP)
(C) Decreasing the column height
(D) Decreasing the size of the particles used to pack a column
What is the first sequenced protein?
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : The free histidine is a dominant buffering system at physiological pH than the protein-bound or dipeptide histidine.
Reason (R) : In proteins or dipeptides, the imidazole pKa decreases substantially-in combination with other amino acids- to a level which is more than 1 pH unit removed from intracellular pH.
Which of the following interventions would result in enhanced chromatographic separation?
(A) Increasing the number of theoretical plates
(B) Decreasing the Height Equivalent to a Theoretical Plate (HETP)
(C) Decreasing the column height
(D) Decreasing the size of the particles used to pack a column
Match List-I with List-II

List-I (Name of the component) & List-II (Vitamin/Coenzyme)
(A) Pantothenic acid & (II) Coenzyme A
(B) Para-Amino Benzoic Acid (PABA) & (III) Folic acid
(C) Ribose & (I) NAD
(D) Pentanoic acid & (IV) Lipoic acid

The catalytic center of which of the following protease families consists of a catalytic triad of aspartate, histidine and serine ?
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Depsipeptides have more flexible structure and lower rotational barrier for cis-trans isomerization than their native analogs.
Reason (R) : One or more amide linkages in depsipeptides are replaced with corresponding ester groups leading to their reduced hydrogen bonding capacity, which in turn results in deformed secondary structures.
In light of the above statements, choose the correct answer from the options given below.
Match List-I with List-II

List-I (Reaction catalyzed/Name of the enzyme) & List-II (Class of enzyme)
(A) Formation and removal of carbon-carbon double bonds & (I) Ligase
(B) Amino acyl $-$ tRNA synthetase & (II) Hydrolase
(C) Transamination & (III) Lyase
(D) Removal of fatty acids from triglycerides & (IV) Transferase
The number of stereoisomers for n-carbon aldoses and ketoses respectively are:
Match List-I with List-II

List-I (Molecule) & List-II (Type of peptide)
(A) Aspartame & (I) Tripeptide
(B) Glutathione & (II) Tetrapeptide
(C) Oxytocin & (III) Nonapeptide
(D) Endomorphin & (IV) Dipeptide
The membrane protein channels or pores controlling the selective movement of water are
The regulation of plant development by light is termed as
In metabolically active cells, the osmotic pressure is equal to
Water is a liquid over the range of temperatures most compatible with life. The energy required to convert one mole of liquid water to one mole of water vapor is called
Exudation of sap from the cut surface of the stem of a well-watered herbaceous plant is due to the positive pressure in the xylem, which is termed as
Plasmid vector will essentially have
The antibiotic oligomycin inhibits the oxidative phosphorylation by which of the following mechanisms?
Enzymes involved in the complete oxidation and utilization of odd-chain fatty acids:
A. Propionyl CoA carboxylase
B. Thiolase
C. Fatty acyl CoA synthetase
D. Methylmalonyl CoA mutase
E. Methylmalonyl CoA racemase
Choose the correct sequence in which aforementioned enzymes act for the purpose of oxidation and utilization of odd-chain fatty acids as a source of energy.
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : The uncompetitive inhibitors bind only to the enzyme-substrate (ES) complex and not to the free enzyme.
Reason R : Binding of the substrate to the enzyme causes a change in its conformation, which reveals the inhibitor-binding site.
In light of the above statements, choose the correct answer from the options given below
Match List I with List II
List I (Name of the fatty acid):
A. Ricinoleic acid
B. Linolenic acid
C. Palmitoleic acid
D. Erucic acid

List II (Type of the fatty acid):
I. $\omega$-3
II. $\omega$-6
III. $\omega$-7
IV. $\omega$-9
V. Hydroxylated

Choose the correct answer from the options given below:
Which of the following molecules functions as provitamin $\text{D}_3$?}