MCQ QUESTION for class 11 Biology Ch 9 Biomolecules for 2021 -21 latest cbse pattern
Question 1.
Blood corpuscles are formed in the
(a) Haversian canal
(b) pancreas
(c) red bone marrow
(d) endosteum
Answer
(c) Red Bone Marrow
An example of competitive inhibition of an enzyme is the inhibition of
(a) succinic dehydrogenase by malonic acid
(b) cytochrome oxidase by cyanide
(c) hexokinase by glucose-6-phosphate
(d) carbonic anhydrase by carbon dioxide
Answer
(a) succinic dehydrogenase by malonic acidQuestion 3.
Insulin is made up of _______ and _______.
(a) glucose and Aab e hayat
(b) glucose and fructose
(c) fructose and mannose
(d) mannose and glucose
Insulin is made up of _______ and _______.
(a) glucose and Aab e hayat
(b) glucose and fructose
(c) fructose and mannose
(d) mannose and glucose
Answer
(b) glucose and fructose [insulin is a polysaccharide made up of glucose and fructose]
Question 4.
Enzymes increase the rate of reaction by
(a) lowering activation energy
(b) increasing activation energy
(c) increasing temperature and pH
(d) decreasing temperature and pH
Enzymes increase the rate of reaction by
(a) lowering activation energy
(b) increasing activation energy
(c) increasing temperature and pH
(d) decreasing temperature and pH
Answer
(a) lowering activation energy Question 5.
A nucleotide is formed of
(a) Nitrogen base, calcium and phosphate
(b) pyrimidian, sugar and phosphate
(c) purine, sugar and phosphate
(d) Nitrogen base, sugar and phosphate
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Answer
(d) Nitrogen base, sugar and phosphate Tips:- padhliya karo baccho Question 6.
Most abundant organic compound on earth is
(a) CO2
(b) cellulose
(c) steriods
(d) proteins
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Answer
(b) celluloseQuestion 7.
In RNA thymine is replaced by
(a) guanine
(b) adenine
(c) both a and b
(d) nor a and b
Answer
(d) nor a and b explanation*- in RNA thymine is replaced by uracil Question 8.
Essential Amino acid includes
(a) tryptophan
(b) leucine
(c) valine
(d) all of these
Answer
All of these Question 9.
Which of the following is not the part of enzyme but activates the enzyme
(A) K
(B) C
(C) Si
(D)I don't know
Answer
(A) KAdvertisement |
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Question 10.
Bonds that do not exist in tertiary sectors of proteins
(A) ionic bonds
(B) covalent bonds
(C) phospodiester bonds
(D) hydrophobic etnractions
Answer
(c) phospodiester bondsQuestion 11.
Oils are rich in
(A) fats that are generally liquid at room temperature
(B) glycerol that posses three hydroxyl groups
(C) esters of fatty acids
(D) saturated fatty acids
Answer
(a) fats that are generally liquid at room temperature Question 12.
Which of the following is not the conjugated Protein
(A) peptone
(B) glyptoprotein
(C) chromoprotien
(D)leucoprotein
Answer
(a) peptone Question 13.
Glucose is a
(A) Ketose hexose sugar
(B) pyronose pentose sugar
(C) aldose hexose sugar
(D) furanose pentose sugar
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Answer
(c) aldose hexose sugar Question 14.
Which enzyme is used by the biscuit manufacturers to lower the proteins level of flour?
(A) amylase
(B) protease
(C) cellulases
(D) xylases
Answer
(b) proteases Question 15.
Assertion : All Enzymes are not proteins
Reason : RNA molecules that posses catalytic activity are called ribozymes.
(A) both assertion & reason are true and the reason is the correct explaination of assertion
(B) both assertion and reason are true but reason isn't the correct explaination of assertion
(C) assertion is true but reason is false
(D) both false
Answer
(B) both assertion and reason is true but reason isn't teh correct explaination of assertion Question 16.
Assertion : A coenzyme or metal ion tightly bound to enzyme protein is called prosthetic group
Reason : A complete catalytically active enzyme together with its bound prosthetic group is called apoenzyme
(A) Both Assertion and reason are correct and reason is correct explaination of assertion
(B) both assertion and reason are correct but reason aren't the correct explaination of assertion
(C) assertion is true but reasoj is false
(D) both false
Answer
(c) Assertion is true but reason is false Question 17.
Protein enzyme is formed by chemically bonding together of
(A) lipases
(B) carbohydrates
(C) amino acids
(D) Titanium
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Answer
(c) Amino acids Question 18.
Which one of the following is wrongly matched?
(a) Enzyme – Lipopolysaccharide
(b) Phospholipid – Plasma membrane
(c) ATP – Nucleotide derivative
(d) Antibody – Glycoprotein
(a) Enzyme – Lipopolysaccharide
(b) Phospholipid – Plasma membrane
(c) ATP – Nucleotide derivative
(d) Antibody – Glycoprotein
Answer
(a) Enzyme - Lipospolysachride explanation*--- because it lipospolysachride is a polysachride and enzyme is finished with lases mostly Question 19.
Maximum amount of iron occurs in
(A) Enzymes and protein
(B) bone cells
(C) Leucocyte
(D) erythrocyte
Answer
(d) erythrocyte Question 20.
Metabolic intermediates found in living system which are essential for growth and life is called___________
(a) Saponins
(b) Tannins
(c) Secondary metabolite
(d) Primary metabolites
(a) Saponins
(b) Tannins
(c) Secondary metabolite
(d) Primary metabolites
Answer
(D) primary Metabolites Question 21.
In which of the following, a polysaccharide found in the cell membrane
(a) Adenine
(b) guanine
(c) Lectithin
(d) None of these
Answer
(c) Lectithin Question 22.
Which of the following is not a substituted pyrimidine.
(I) Adenine
(II) guanine
(III) thymine
(IV) uridine
(V) cytidine
(a) I only (b) I, II, AND III
(c) I, III, IV (d) III, IV, & V
Answer
(d) III, IV, AND V Question 23.
In DNA which nitrogen base isn't present as neuclotides
(a) uracil
(b) Thymine
(C) Guanine
(D) adenine
Answer
(a) uracil Question 24.
α < -keto acids is formed which Biomolecules
(a) DNA & RNA
(b) Adenylic aicds
(c) Amino Acid
(d) All of theses
Answer
(c) Amino Acid Question 25.
Glycogen is synthesised and stored in
(a) Mitochondia
(b) heart
(c) liver cell
(d) brain
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