Biology · Chemistry
Biomolecules and Enzymes
1,432 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
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Proteins
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Carbohydrates
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Fats
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Vitamins
A
Correct answer
Explanation
They are the complex polymers of amino acids.
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Collagen
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Elastin
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Ossein
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Actin
D
Correct answer
Explanation
It is present in muscle fibres.
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Amino acids
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Fatty acids
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Nucleotides
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Monosaccharides
A
Correct answer
Explanation
These are joined by a peptide bond to form peptide chains.
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Many proteins are the structural component of the cell membrane.
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Enzymes and hormones are basically proteins that maintain homeostasis.
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Proteins are energy rich compounds used as immediate energy source.
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Immunoglobulins are the proteins associated with the immune system.
C
Correct answer
Explanation
Carbohydrates are used as immediate energy source.
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derived proteins
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nucleoproteins
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mucoproteins
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simple proteins
D
Correct answer
Explanation
These are the simple proteins made from amino acids alone.
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Competitive inhibition
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Non-competitive inhibition
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Alloseric inhibition
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Feed-back inhibition
C
Correct answer
Explanation
It occurs due to change in the allosteric site.
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Fibrous protein
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Chromoprotein
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Phosphoprotein
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Nucleoprotein
B
Correct answer
Explanation
In haemoglobin, globulin protein is associated with the heme-group, which gives it the red colour.
C
Correct answer
Explanation
Alpha-keratin is a fibrous structural protein found in the hair, nails, and wool of mammals.
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carbon
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nitrogen
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oxygen
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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.
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lyases
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isomerases
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ligase
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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.
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Virus
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Viroids
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Epsilon
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Preens
B
Correct answer
Explanation
Viroids are infectious agents composed solely of a short, circular, single-stranded RNA molecule, which is a low molecular weight nucleic acid. They lack the protein coat found in viruses.
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Proteins
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Mucopeptide
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Mucilages
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Monosaccharides
B
Correct answer
Explanation
The bacterial cell wall is primarily composed of peptidoglycan, which is also known as mucopeptide or murein. This structure provides rigidity and protection to the cell.
B
Correct answer
Explanation
Proteins are composed of amino acids, which always contain Carbon, Hydrogen, Oxygen, and Nitrogen. Sulfur is present in some amino acids (like cysteine) but not all proteins.
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deamination
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excretion
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amination
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egestion
A
Correct answer
Explanation
Separation of amino acid into amino and carboxyl group is known as deamination.In the human body, deamination takes place primarily in the liver, however glutamate is also deaminated in the kidneys.
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Uricase
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Urease
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Arginase
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None of these
C
Correct answer
Explanation
The arginase enzyme helps in the production of urea. It is the final enzyme of urea cycle. It converts arginine into urea and ornithine.