Biology · Chemistry
Biomolecules and Enzymes
1,501 Questions
This topic focuses on biomolecules, specifically proteins, enzymes, and amino acids. It includes questions on enzyme structures, protein folding, and catalysis. These concepts are crucial for medical and biology competitive exams.
Enzyme catalysisProtein structuresAmino acid synthesisPolypeptide chainsBiomolecule properties
Biomolecules and Enzymes Questions
-
Casein
-
Albumen
-
Prolamins
-
Glutelin
-
Isobutyryl - CoA mutase
-
Methylmalonyl - CoA mutase
-
Methionyl aminopeptidase
-
Nitrile hydratase
-
Cytochrome oxidase
E
Correct answer
Explanation
Cytochrome oxidase metalloenzyme contains copper. Cytochrome oxidase is a metalloenzyme containing copper and a porphyrin, found in mitochondria and important in cell respiration as an agent of electron transfer from certain cytochrome molecules to oxygen molecules.
-
Valine
-
Glycine
-
Alanine
-
Leucine
-
Serine
B
Correct answer
Explanation
α–carbon is achiral in glycine and hence does not exist in either of the two forms, L or D form.
-
Aspartame
-
Lysine
-
Threonine
-
Glutamate
-
5-hydroxytryptophan
D
Correct answer
Explanation
Glutamic acid is used as flavour enhancer in food industry,
-
Arginine and histidine
-
Tyrosine and tryptophan
-
Leucine and lysine
-
Glutamate and aspartate
-
Isoleucine and threonine
C
Correct answer
Explanation
Only leucine and lysine are not glucogenic.
-
Lanthionine
-
Selenocysteine
-
Pyrrolysine
-
Mimosine
-
Eflornithine
D
Correct answer
Explanation
Mimosine is found in legume, Leucaena leucocephala. It is an analogue of tyrosine and can poison animals that graze on these legumes.
-
Cysteine and glutamic acid
-
Lysine and methionine
-
Two alanine residues
-
Lysine and glutamic
-
lysine and cysteine
B
Correct answer
Explanation
Carnitine is biosynthesized from the amino acids lysine and methionine. It transports fatty acids from cytosol to mitochondria.
-
Tyrosine
-
Arginine
-
Tryptophan
-
Ornithine
-
Glycine
C
Correct answer
Explanation
Tryptophan is a precursor of the neurotransmitter serotonin.
-
epitope
-
paratope
-
histotope
-
idiotope
-
Fc region
D
Correct answer
Explanation
Idiotope can be the actual antigen-binding site or some may comprise variable region sequences outside of the antigen-binding site on the antibody itself
-
Succinyl CoA
-
Glycine
-
Aminolevulinate
-
Both 1 and 2
-
Pyridoxal phosphate
D
Correct answer
Explanation
Succinyl CoA and glycine are two starting materials for heme synthesis.
-
Sodium dodecyl sulphate
-
Bisacrylamide
-
Mercaptoethanol
-
Ammonium persulphate
-
Butanol
B
Correct answer
Explanation
Bisacrylamide forms cross-links between two polyacrylamide molecules.
-
silent mutation
-
missense mutation
-
nonsense mutation
-
frame shift mutation
-
antisense mutation
B
Correct answer
Explanation
In this type of mutation, there is replacement of one amino acid by another aminoacid.
-
Amino acids
-
Glycerol
-
Nucleotides
-
Fatty acids
-
Simple sugars
A
Correct answer
Explanation
Amino acids are obtained by the break down of proteins.
-
Sulphur
-
Nitrogen
-
Phosphorus
-
Amino acids
-
None of these
D
Correct answer
Explanation
The basic unit of protein is amino acids.
-
ConSite
-
AlignACE
-
Melina
-
PhyloCon
C
Correct answer
Explanation
This option is correct because Melina is a web-based program that runs four individual motif-finding algorithms, MEME, GIBBS sampling, CONSENSUS, and Coresearch simultaneously.