Back to BIOMOLECULES

Your Progress

0 / 331 Answered

Correct

Incorrect

Accuracy

NEET • BIOLOGY • BIOMOLECULES

Biomolecules practice · Mixed difficulty

Choose an answer to check it, or open “View answer” to study the explanation. Sign in to save progress to your account.

Practice format and chapter quiz

The practice player uses single-correct-answer MCQs. Chapter quizzes help you review a topic; they are not full-length NEET mock papers.

Take a chapter quiz →

Showing 241-270 of 331 questions

Preparing practice and saved progress…

241 Medium

241 of 331

Remembering +4 | -1

‘G’ in DNA strand base pairs with ‘C’ by 3… bonds

View answer and explanation

Correct option: A

Hydrogen

Option A (Hydrogen) is correct because guanine (G) and cytosine (C) in DNA pair through three hydrogen bonds.

242 Hard

242 of 331

Understanding +4 | -1

The

{3^1} - {5^1}

phosphodiester linkages inside a polynucleotide chain serve to join?

View answer and explanation

Correct option: C

One nucleotide with another nucleotide

Option C (One nucleotide with another nucleotide) is correct because the 3'-5' phosphodiester linkage connects the 3' carbon of one nucleotide's sugar to the 5' carbon of the next nucleotide's sugar in a polynucleotide chain.

243 Medium

243 of 331

Understanding +4 | -1

Catabolic and anabolic pathways are often coupled in cell. Why?

View answer and explanation

Correct option: B

The free energy released from are pathway is used to drive other

Option B (The free energy released from one pathway is used to drive the other) is correct because catabolic reactions release energy that is then used to power anabolic reactions.

244 Medium

244 of 331

Remembering +4 | -1

Which one of the following is a triglyceride?

View answer and explanation

Correct option: C

Oil

Option C (Oil) is correct because oils are triglycerides, which are esters of glycerol and three fatty acids.

245 Medium

245 of 331

Understanding +4 | -1

Why metabolic pathways are comparable to automobile traffic in a city?

View answer and explanation

Correct option: A

Because they have definite direction

Option A (Because they have definite direction) is correct because metabolic pathways, like traffic, have specific routes and regulations.

246 Easy

246 of 331

Understanding +4 | -1

Choose the correct options

View answer and explanation

Correct option: B

E + S ⇌ ES → E - P → E + P

Option B (E + S ⇌ ES → E - P → E + P) is correct because it represents the correct sequence of events in an enzyme-catalyzed reaction, including the reversible formation of the enzyme-substrate complex.

247 Easy

247 of 331

Remembering +4 | -1

An α-helix is the example of …… protein structure

View answer and explanation

Correct option: B

Secondary

Option B (Secondary) is correct because an α-helix is a specific type of secondary protein structure formed by hydrogen bonds.

248 Medium

248 of 331

Remembering +4 | -1

All the carbon compounds obtained from living tissues are named as

View answer and explanation

Correct option: A

Biomolecules

Option A (Biomolecules) is correct because all carbon compounds obtained from living tissues are collectively referred to as biomolecules.

249 Medium

249 of 331

Understanding +4 | -1

Statement-I : A protein is a heteropolymer

Statement-II : Each protein is a polymer of different aminoacids

View answer and explanation

Correct option: A

Both Statement - I and Statement - II are true

Option A is correct because proteins are heteropolymers made of different amino acids.

250 Hard

250 of 331

Understanding +4 | -1

Choose the correct statements
I. Bond energy (ATP) is utilised for biosynthesis, osmotic and mechanical work that we perform
II. When glucose is degraded into lactic acid in our muscles, energy of liberated
III. Assembly of a proteins from amino acids requires energy
IV. Majority of metabolic reactions can occur in isolation
V. There are many examples of uncatalysed metabolic reactions

View answer and explanation

Correct option: A

Except IV and V

Option A (Except IV and V) is correct because statements I, II, and III are accurate descriptions of energy utilization and metabolic processes, while statements IV and V are incorrect.

251 Medium

251 of 331

Analyzing +4 | -1

Select the odd one w.r.t. homopolymers.

View answer and explanation

Correct option: A

Collagen

Option A (Collagen) is the odd one out because it is a protein made of different amino acids, not a homopolymer like the others which are made of repeating glucose units.

252 Hard

252 of 331

Remembering +4 | -1

Which of the following is an amino acid, which is metabolised by the brain?

View answer and explanation

Correct option: D

Glutamic acid

Option D (Glutamic acid) is correct because glutamic acid is a major excitatory neurotransmitter in the brain and is metabolized by brain cells.

253 Medium

253 of 331

Remembering +4 | -1

Almost all enzymes are … in nature

View answer and explanation

Correct option: B

Proteins

Option B (Proteins) is correct because almost all enzymes are proteins.

254 Easy

254 of 331

Understanding +4 | -1

Which enzyme is most specific?

View answer and explanation

Correct option: D

Nuclease

Option C (Sucrase) is correct because sucrase is highly specific, catalyzing the hydrolysis of sucrose only.

255 Hard

255 of 331

Remembering +4 | -1

The sulphur is the constituents of :

a. Thymines

b. Methionine

c. Lecithin

d. Coenzyme A

View answer and explanation

Correct option: D

Only b, d

Option D (Only b, d) is correct because Methionine and Coenzyme A both contain sulfur.

Explore Other Chapters in BIOLOGY

View All →

ANIMAL KINGDOM 756 MCQs PLANT KINGDOM 415 MCQs ANATOMY OF FLOWERING PLANTS 404 MCQs MOLECULAR BASIS OF INHERITANCE 404 MCQs CHEMICAL COORDINATION AND INTEGRATION 387 MCQs PRINCIPLE OF INHERITANCE AND VARIATION 374 MCQs

256 Easy

256 of 331

Understanding +4 | -1

Study the components given in the box below :

\mathrm{Na}^{+}, \mathrm{K}^{+}, \mathrm{H}_2 \mathrm{O}, \mathrm{CaCO}_3, \mathrm{PO}_4^{3-}, \mathrm{SO}_4^{2-}

How many of the above given components represent inorganic constituents of living tissues?

View answer and explanation

Correct option: B

Option B (6) is correct because all the listed components (

\mathrm{Na}^{+}

\mathrm{K}^{+}

\mathrm{H}_2 \mathrm{O}

\mathrm{CaCO}_3

\mathrm{PO}_4^{3-}

\mathrm{SO}_4^{2-}

) are inorganic constituents of living tissues.

257 Easy

257 of 331

Remembering +4 | -1

The term metabolism means

View answer and explanation

Correct option: A

The sum of all the enzymatically catalysed chemical reactions constantly taking place in the cells and tissues of the living organisms

Option A (The sum of all the enzymatically catalysed chemical reactions constantly taking place in the cells and tissues of the living organisms) is correct because metabolism encompasses all chemical processes within an organism.

258 Medium

258 of 331

Remembering +4 | -1

Jacob and Monod named some enzymes as allosteric, whose activity is regulated by

View answer and explanation

Correct option: A

End product

Option A (End product) is correct because allosteric enzymes are often regulated by the end product of the metabolic pathway they participate in, through feedback inhibition.

259 Hard

259 of 331

Remembering +4 | -1

Transfer of amino group from one amino acid to the keto group of keto acid is catalysed by:-

View answer and explanation

Correct option: A

Transaminase

Option A (Transaminase) is correct because transaminases catalyze the transfer of an amino group from an amino acid to a keto acid.

260 Medium

260 of 331

Application +4 | -1

If a polysaccharide contains 6 Glucose monomeric units then what is the molecular formula of polysaccharide:

View answer and explanation

Correct option: C

\mathrm{C}_{36} \mathrm{H}_{62} \mathrm{O}_{31}

Option C (

\mathrm{C}_{36} \mathrm{H}_{62} \mathrm{O}_{31}

) is correct because for each glycosidic bond formed, one molecule of water is removed.

261 Hard

261 of 331

Analyzing +4 | -1

Choose the odd statement w.r.t. enzymes

View answer and explanation

Correct option: B

Succinic dehydrogenase enzyme is inhibited by a non-competitive inhibitor called malonate

Option B is correct because malonate is a competitive inhibitor of succinic dehydrogenase, not a non-competitive inhibitor.

262 Easy

262 of 331

Remembering +4 | -1

Phospholipids are

View answer and explanation

Correct option: A

Conjugated lipids

Option A (Conjugated lipids) is correct because phospholipids contain a lipid component conjugated with a phosphate group and often other molecules like choline.

263 Medium

263 of 331

Remembering +4 | -1

One of the following is a simple protein.

View answer and explanation

Correct option: D

Albumin

Option D (Albumin) is correct because albumin is a simple protein, consisting only of amino acids without any prosthetic groups.

264 Hard

264 of 331

Remembering +4 | -1

Lecithin is a?

View answer and explanation

Correct option: C

Phospholipid

Option C (Phospholipid) is correct because lecithin contains a phosphate group, making it a type of phospholipid.

265 Medium

265 of 331

Understanding +4 | -1

Select the wrong statement

View answer and explanation

Correct option: D

Collagen is the most abundant protein in the whole of the biosphere and Rubisco is the most abundant proteins in animal world

Option D is wrong because Rubisco is the most abundant protein in the biosphere, not just the animal world, and collagen is abundant but not the most abundant overall.

266 Medium

266 of 331

Understanding +4 | -1

Given below is a list of some polysaccharide
a. Cellulose b. Starch c. Glycogen d. Paper
Which of the following can hold

{I_2}

molecules in the helical portion and produce colour with

{I_2}

solution?

View answer and explanation

Correct option: B

b and c

Option B (b and c) is correct because starch and glycogen can hold iodine molecules within their helical structures, producing a color change.

267 Medium

267 of 331

Analyzing +4 | -1

Find the odd one out.

View answer and explanation

Correct option: C

Inulin

Option C (Inulin) is correct because Inulin is a polysaccharide, while Terpene, Suberin, and Cutin are lipids.

268 Easy

268 of 331

Remembering +4 | -1

The most abundant chemical in living organisms is

View answer and explanation

Correct option: B

Water

Option B (Water) is correct because water is the most abundant chemical compound found in living organisms.

269 Hard

269 of 331

Remembering +4 | -1

Water molecules are connected by

View answer and explanation

Correct option: C

H-bond

Option C (H-bond) is correct because water molecules are connected to each other through hydrogen bonds.

270 Hard

270 of 331

Understanding +4 | -1

The differences in D and L forms of sugars are based on:

View answer and explanation

Correct option: B

configuration of

{H}

and

{OH}

groups around the penultimate carbon.

Option B is correct because D and L forms of sugars are based on the configuration of H and OH groups around the penultimate carbon atom.

Revision notes and key takeaways

Review BIOMOLECULES in your textbook or class notes, then use this set to check your understanding.

Showing 241-270 of 331 questions

Your Progress

Biomolecules practice · Mixed difficulty

Explore Other Chapters in BIOLOGY

Continue Your Practice

Your practice