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
-
cartilagin
-
ossein
-
chondrin
-
chitin
C
Correct answer
Explanation
Chondrin is a protein found in cartilage.
-
algae derived protein
-
red algae derived pigment
-
kelp derived toxin
-
kelp derived carbohydrate
D
Correct answer
Explanation
Alginate is a carbohydrate found in the cell walls of kelp or brown algae and is of great use as jelling and thickening agent in ice-creams and also in pharmaceutical industry.
-
Proteins
-
Carbohydrates
-
Fats
-
Vitamins
A
Correct answer
Explanation
They are the complex polymers of amino acids.
-
Collagen
-
Elastin
-
Ossein
-
Actin
D
Correct answer
Explanation
It is present in muscle fibres.
-
They work at high temperatures.
-
They have high diffusion rate.
-
They do not get used up in the reaction.
-
They are proteinaceous in nature.
D
Correct answer
Explanation
Enzymes are basically proteins but the catalysts are inorganic compounds.
-
Amino acids
-
Fatty acids
-
Nucleotides
-
Monosaccharides
A
Correct answer
Explanation
These are joined by a peptide bond to form peptide chains.
-
Many proteins are the structural component of the cell membrane.
-
Enzymes and hormones are basically proteins that maintain homeostasis.
-
Proteins are energy rich compounds used as immediate energy source.
-
Immunoglobulins are the proteins associated with the immune system.
C
Correct answer
Explanation
Carbohydrates are used as immediate energy source.
-
derived proteins
-
nucleoproteins
-
mucoproteins
-
simple proteins
D
Correct answer
Explanation
These are the simple proteins made from amino acids alone.
-
Competitive inhibition
-
Non-competitive inhibition
-
Alloseric inhibition
-
Feed-back inhibition
C
Correct answer
Explanation
It occurs due to change in the allosteric site.
-
Fibrous protein
-
Chromoprotein
-
Phosphoprotein
-
Nucleoprotein
B
Correct answer
Explanation
In haemoglobin, globulin protein is associated with the heme-group, which gives it the red colour.
-
calcium 2-aminoethylphosphate
-
calcium-alpha-ketoglutarate
-
calcium β-hydroxy-β-methylbutyrate
-
dodecacalcium hepta-aluminate
A
Correct answer
Explanation
Calcium 2-aminoethylphosphate (Ca-AEP or Ca-2AEP) is a vital component in the structure of cell membranes in the human body. It is the calcium salt of phosphorylethanolamine. Ca-AEP has been shown to help maintain cell membrane integrity and improve cellular functions.
C
Correct answer
Explanation
Alpha-keratin is a fibrous structural protein found in the hair, nails, and wool of mammals.
-
carbon
-
nitrogen
-
oxygen
-
hydrogen
B
Correct answer
Explanation
Proteins are polymers composed of amino acids, which are characterized by the presence of an amino group containing nitrogen atoms.
-
agricultural waste
-
wood distillation
-
processing of crude oil
-
the secretion of lac insect
D
Correct answer
Explanation
Shellac is a resin secreted by the female lac insect (Laccifer lacca) on trees in the forests of India and Thailand.
-
lyases
-
isomerases
-
ligase
-
proteoplytic
A
Correct answer
Explanation
Lyases are enzymes cleaving C-C, C-O, C-N, and other bonds by elimination, leaving double bonds or rings, or conversely adding groups to double bonds.