Biomolecules — DPP 3

20 NEET questions from Biomolecules, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
Which of following statements is incorrect -
  1. A Proteins have a polyamide chain while nucleic acids contains a poly phosphate
  2. B Nucleic acids are long chain polymers of nucleotides
  3. C RNA is major source of genetic information
  4. D Proteins are synthesized in a process involving translation of RNA.
Show answer & explanation

Correct answer: C

DNA contains the major source of genetic information that is copied to another DNA molecule.
DNA $\xrightarrow{\text { Transcription }}$ RNA $\xrightarrow{\text { Translation }}$ Protein
2
Match the column.
Biomolecules – NEET-17498
  1. A a – q, b – s, c – r, d - p
  2. B a – q, b – r, c – p, d - s
  3. C a – r, b – s, c – p, d - q
  4. D a – r, b – p, c – q, d - s
Show answer & explanation

Correct answer: B

Carbohydrate Monosaccharide unit
Maltose $\rightarrow$ Two α-D-Glucose
Lactose $\rightarrow$ β-D-Galactose & β-D-Glucose
Cellulose $\rightarrow$ β-D-Glucose
Sucrose $\rightarrow$ α-D-Glucose & β-D-Fructose
3
Which of following statement is not true for enzyme –
  1. A Some enzymes can be non proteins also
  2. B Prothetic groups which get attached to enzyme at the time of reaction are known as cofactor.
  3. C Enzymes provides lower activation pathways there by increasing the rate of reaction
  4. D None of these
Show answer & explanation

Correct answer: B

Option (1) Ribozyme non protein enzyme.
Ans is (2) option as the prosthetic that it attach to enzyme at the time of reaction is known as coenzyme.
Cofactor is combination of Coenzyme & Prosthetic group.
4
Which statement is/are incorrect -
  1. A Natural starch has approximately 10-20 % of amylose and 80-90 % of amylopectin.
  2. B Amylose is water soluble and gives blue colour with iodine
  3. C Amylopectin is a branched chain polysaccharides insoluble in water and does not give blue colour with iodine
  4. D Starch is not hydrolysed by enzyme amylase present in saliva
Show answer & explanation

Correct answer: D

Biomolecules – NEET-17495
5
Structure of glycogen is similar to :-
  1. A Amylose
  2. B Amylopectin
  3. C Cellulose
  4. D Glucose
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Correct answer: B

Glycogen structure is similar to amylopectin which is highly branched.
6
Which of the following B group vitamins can be stored in our body.
  1. A Vitamin B$_{1}$
  2. B Vitamin B$_{2}$
  3. C Vitamin B$_{6}$
  4. D Vitamin B$_{12}$
Show answer & explanation

Correct answer: D

Only Vitamin B$_{12}$ ⎯→ Store in Body
Water soluble vitamin B, vitamin C Readily excreted in Urine and Cannot be stored (Except-Vit. B$_{12}$)
7
The change in the optical rotation of freshly prepared solution of glucose is known as :-
  1. A Tautomerism
  2. B Racemisation
  3. C Specific rotation
  4. D Mutarotation
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Correct answer: D

α − D − Glucose ⇌ Glucose ⇌ β − D − Glucose (Mutarotation)
8
The nitrogenous base having two possible hydrogen bonding sites is –
  1. A Thymine
  2. B Cytosine
  3. C Guanine
  4. D None
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Correct answer: A

Biomolecules – NEET-16714
9
Cofactor which gets attached to the enzyme at the time of reaction are known as
  1. A Coenzymes
  2. B Apoenzyme
  3. C Prothetic group
  4. D None of these
Show answer & explanation

Correct answer: A

Biomolecules – NEET-17486
10
Match the column.
Biomolecules – NEET-17499

  1. A a – p, b – r, c – q, d - s
  2. B a – r, b – p, c – q, d - s
  3. C a – p, b – r, c – s, d - q
  4. D a – r, b – p, c – s, d - q
Show answer & explanation

Correct answer: B

Biomolecules – NEET-17499
11
Cellulose can not be tested by followings -
  1. A Fehling's solution
  2. B Tollen's reagent
  3. C Both of these
  4. D None of these
Show answer & explanation

Correct answer: C

Cellulose → Polysaccharide Non-reducing in Nature
So No Reaction with Fehling solutions and Tollen reagent.
12
Which of the following disaccharide is a non-reducing sugar :
  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer: C

13
Which vitamin is synthesize in human body from carotene
  1. A Vitamin-A
  2. B Vitamin-C
  3. C Vitamin-K
  4. D All of these
Show answer & explanation

Correct answer: A

Carotene → Vit. A
14
Which amino acids are called non essential –
  1. A Those which can be synthesized in the body.
  2. B Those which have more amino groups as compared to carboxyl groups
  3. C Those which have equal number of amino acid and carboxyl groups
  4. D None of these
Show answer & explanation

Correct answer: A

Biomolecules – NEET-16661
15
Mainly DNA is localized in –
  1. A Cytoplasm
  2. B Nucleus
  3. C Mitochondria
  4. D Chloroplasts
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Correct answer: B

Mainly DNA is localized in Nucleus
16
Protein found in biological system with definite configuration and biological activity is called -
  1. A Amino acids
  2. B Native protein
  3. C Conformer protein
  4. D Inactive protein
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Correct answer: B

Native protein
17
The helical structure of protein is stabilized by –
  1. A Hydrogen bonds
  2. B Ether bonds
  3. C Peptide bonds
  4. D Dipeptide bonds
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Correct answer: A

Biomolecules – NEET-16618

18
A single stand of DNA can act as a template on which a molecule of RNA is synthesized in a specific manner. This process is known as –
  1. A Replication
  2. B Transcription
  3. C Translation
  4. D None of these
Show answer & explanation

Correct answer: B

DNA $\xrightarrow{\text { transcription }}$ RNA $\xrightarrow{\text { Translation }}$ Protein
19
Reducing sugars are one which :
  1. A Reduce fehling's solutions
  2. B Not reduce tollen's reagent
  3. C Have bonded aldehydic or ketonic groups
  4. D All of these
Show answer & explanation

Correct answer: A

Reducing sugars → Reduced fehling’s solution
→ Reduced tollen’s reagent
20
Which of following are essential amino acids–
(a) Aspartic acid
(b) Leucine
(c) Valine
(d) Glycine
(e) Alanine
  1. A a, b & c
  2. B a, b, d & e
  3. C b & c
  4. D a, c, d & e
Show answer & explanation

Correct answer: C

Essential amino acid are those amino acid which are not produced by body & have to consumed externally.
Ex. Leucine & valine

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