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Home/NEET/biology/biomolecules
Curated PYQ Collection

Top 50 Most Repeated BIOMOLECULES PYQs | NEET

A curated collection of the most important questions from BIOMOLECULES, fully solved with step-by-step concepts to prepare for NEET.

Question #1

Practice Question

A.It decreases the Km without affecting Vmax
B.It decreases the Vmax without affecting Km
C.It increases both Km and Vmax
D.It increases Vmax while Km remains unchanged

Concept Applied

A competitive inhibitor binds reversibly to the active site, competing with the substrate. This raises the apparent Km (requires higher substrate conc...

Read Full Step-by-Step Solution →

Question #2

Practice Question

A.Glucose
B.Sucrose
C.Starch
D.Cellulose

Concept Applied

Sucrose is made of glucose and fructose; others are mono- or polysaccharides....

Read Full Step-by-Step Solution →

Question #3

Practice Question

A.Phosphate group, ribose sugar, nitrogenous base
B.Phosphate group, deoxyribose sugar, nitrogenous base
C.Sulfate group, ribose sugar, nitrogenous base
D.Phosphate group, glucose, nitrogenous base

Concept Applied

A DNA nucleotide consists of a phosphate group, a deoxyribose sugar, and a nitrogenous base (A, T, G, C). RNA has ribose instead of deoxyribose....

Read Full Step-by-Step Solution →

Question #4

Practice Question

A.Covalent bond
B.Hydrogen bond
C.Ionic bond
D.Peptide bond

Concept Applied

In nucleotides, the nitrogenous base is linked to the sugar via a β‑N‑glycosidic covalent bond, and the phosphate group forms phosphodiester covalent ...

Read Full Step-by-Step Solution →

Question #5

Practice Question

A.Krebs cycle
B.Oxidative phosphorylation
C.Glycolysis
D.Electron transport chain

Concept Applied

Glycolysis occurs in cytoplasm; Krebs cycle and ETC occur in mitochondria....

Read Full Step-by-Step Solution →

Question #6

Practice Question

A.Highly specific to substrate
B.May require cofactors
C.Destroyed by competitive inhibition
D.Altered by non-competitive inhibitors

Concept Applied

Competitive inhibition is reversible; active site is not destroyed....

Read Full Step-by-Step Solution →

Question #7

Practice Question

A.Triglycerides
B.Waxes
C.Phospholipids
D.Steroids

Concept Applied

Phospholipids have a phosphate head and two fatty acid tails....

Read Full Step-by-Step Solution →

Question #8

Practice Question

A.Glycosidic bond
B.Peptide bond
C.Phosphodiester bond
D.Hydrogen bond

Concept Applied

The phosphate group links the 3' carbon of one sugar to the 5' carbon of the next....

Read Full Step-by-Step Solution →

Question #9

Practice Question

A.Competitive inhibition
B.Non‑competitive inhibition
C.Uncompetitive inhibition
D.Allosteric inhibition

Concept Applied

When an inhibitor occupies the active site, it directly competes with the substrate for binding, which is the hallmark of competitive inhibition....

Read Full Step-by-Step Solution →

Question #10

Practice Question

A.Active site
B.Allosteric site
C.Cofactor
D.Substrate

Concept Applied

Competitive inhibitors compete with substrate for the active site....

Read Full Step-by-Step Solution →

Question #11

Practice Question

A.Phosphodiester bonds between sugar and base
B.Hydrogen bonds between phosphate and sugar
C.Phosphodiester bonds between sugar of one nucleotide and phosphate of the next
D.Glycosidic bonds between adjacent sugars

Concept Applied

The DNA backbone consists of alternating sugar and phosphate groups. Phosphodiester bonds link the 3' carbon of one deoxyribose sugar to the 5' carbon...

Read Full Step-by-Step Solution →

Question #12

Practice Question

A.It increases the Michaelis constant $K_m$ while $V_{\max}$ remains unchanged.
B.It decreases $K_m$ while $V_{\max}$ remains unchanged.
C.It decreases both $K_m$ and $V_{\max}$.
D.It increases both $K_m$ and $V_{\max}$.

Concept Applied

A competitive inhibitor competes with substrate for the active site, raising the apparent $K_m$ (lower affinity) but does not affect the maximum veloc...

Read Full Step-by-Step Solution →

Question #13

Practice Question

A.It decreases the Km without affecting Vmax
B.It decreases the Vmax without affecting Km
C.It increases both Km and Vmax
D.It increases Vmax while Km remains unchanged

Concept Applied

A competitive inhibitor binds reversibly to the active site, competing with the substrate. This raises the apparent Km (requires higher substrate conc...

Read Full Step-by-Step Solution →

Question #14

Practice Question

A.Glucose
B.Sucrose
C.Starch
D.Cellulose

Concept Applied

Sucrose is made of glucose and fructose; others are mono- or polysaccharides....

Read Full Step-by-Step Solution →

Question #15

Practice Question

A.Phosphate group, ribose sugar, nitrogenous base
B.Phosphate group, deoxyribose sugar, nitrogenous base
C.Sulfate group, ribose sugar, nitrogenous base
D.Phosphate group, glucose, nitrogenous base

Concept Applied

A DNA nucleotide consists of a phosphate group, a deoxyribose sugar, and a nitrogenous base (A, T, G, C). RNA has ribose instead of deoxyribose....

Read Full Step-by-Step Solution →

Question #16

Practice Question

A.Covalent bond
B.Hydrogen bond
C.Ionic bond
D.Peptide bond

Concept Applied

In nucleotides, the nitrogenous base is linked to the sugar via a β‑N‑glycosidic covalent bond, and the phosphate group forms phosphodiester covalent ...

Read Full Step-by-Step Solution →

Question #17

Practice Question

A.Krebs cycle
B.Oxidative phosphorylation
C.Glycolysis
D.Electron transport chain

Concept Applied

Glycolysis occurs in cytoplasm; Krebs cycle and ETC occur in mitochondria....

Read Full Step-by-Step Solution →

Question #18

Practice Question

A.Highly specific to substrate
B.May require cofactors
C.Destroyed by competitive inhibition
D.Altered by non-competitive inhibitors

Concept Applied

Competitive inhibition is reversible; active site is not destroyed....

Read Full Step-by-Step Solution →

Question #19

Practice Question

A.Triglycerides
B.Waxes
C.Phospholipids
D.Steroids

Concept Applied

Phospholipids have a phosphate head and two fatty acid tails....

Read Full Step-by-Step Solution →

Question #20

Practice Question

A.Glycosidic bond
B.Peptide bond
C.Phosphodiester bond
D.Hydrogen bond

Concept Applied

The phosphate group links the 3' carbon of one sugar to the 5' carbon of the next....

Read Full Step-by-Step Solution →

Question #21

Practice Question

A.Competitive inhibition
B.Non‑competitive inhibition
C.Uncompetitive inhibition
D.Allosteric inhibition

Concept Applied

When an inhibitor occupies the active site, it directly competes with the substrate for binding, which is the hallmark of competitive inhibition....

Read Full Step-by-Step Solution →

Question #22

Practice Question

A.Active site
B.Allosteric site
C.Cofactor
D.Substrate

Concept Applied

Competitive inhibitors compete with substrate for the active site....

Read Full Step-by-Step Solution →

Question #23

Practice Question

A.Phosphodiester bonds between sugar and base
B.Hydrogen bonds between phosphate and sugar
C.Phosphodiester bonds between sugar of one nucleotide and phosphate of the next
D.Glycosidic bonds between adjacent sugars

Concept Applied

The DNA backbone consists of alternating sugar and phosphate groups. Phosphodiester bonds link the 3' carbon of one deoxyribose sugar to the 5' carbon...

Read Full Step-by-Step Solution →

Question #24

Practice Question

A.It increases the Michaelis constant $K_m$ while $V_{\max}$ remains unchanged.
B.It decreases $K_m$ while $V_{\max}$ remains unchanged.
C.It decreases both $K_m$ and $V_{\max}$.
D.It increases both $K_m$ and $V_{\max}$.

Concept Applied

A competitive inhibitor competes with substrate for the active site, raising the apparent $K_m$ (lower affinity) but does not affect the maximum veloc...

Read Full Step-by-Step Solution →

Question #25

Practice Question

A.It decreases the Km without affecting Vmax
B.It decreases the Vmax without affecting Km
C.It increases both Km and Vmax
D.It increases Vmax while Km remains unchanged

Concept Applied

A competitive inhibitor binds reversibly to the active site, competing with the substrate. This raises the apparent Km (requires higher substrate conc...

Read Full Step-by-Step Solution →

Question #26

Practice Question

A.Glucose
B.Sucrose
C.Starch
D.Cellulose

Concept Applied

Sucrose is made of glucose and fructose; others are mono- or polysaccharides....

Read Full Step-by-Step Solution →

Question #27

Practice Question

A.Phosphate group, ribose sugar, nitrogenous base
B.Phosphate group, deoxyribose sugar, nitrogenous base
C.Sulfate group, ribose sugar, nitrogenous base
D.Phosphate group, glucose, nitrogenous base

Concept Applied

A DNA nucleotide consists of a phosphate group, a deoxyribose sugar, and a nitrogenous base (A, T, G, C). RNA has ribose instead of deoxyribose....

Read Full Step-by-Step Solution →

Question #28

Practice Question

A.Covalent bond
B.Hydrogen bond
C.Ionic bond
D.Peptide bond

Concept Applied

In nucleotides, the nitrogenous base is linked to the sugar via a β‑N‑glycosidic covalent bond, and the phosphate group forms phosphodiester covalent ...

Read Full Step-by-Step Solution →

Question #29

Practice Question

A.Krebs cycle
B.Oxidative phosphorylation
C.Glycolysis
D.Electron transport chain

Concept Applied

Glycolysis occurs in cytoplasm; Krebs cycle and ETC occur in mitochondria....

Read Full Step-by-Step Solution →

Question #30

Practice Question

A.Highly specific to substrate
B.May require cofactors
C.Destroyed by competitive inhibition
D.Altered by non-competitive inhibitors

Concept Applied

Competitive inhibition is reversible; active site is not destroyed....

Read Full Step-by-Step Solution →

Question #31

Practice Question

A.Triglycerides
B.Waxes
C.Phospholipids
D.Steroids

Concept Applied

Phospholipids have a phosphate head and two fatty acid tails....

Read Full Step-by-Step Solution →

Question #32

Practice Question

A.Glycosidic bond
B.Peptide bond
C.Phosphodiester bond
D.Hydrogen bond

Concept Applied

The phosphate group links the 3' carbon of one sugar to the 5' carbon of the next....

Read Full Step-by-Step Solution →

Question #33

Practice Question

A.Competitive inhibition
B.Non‑competitive inhibition
C.Uncompetitive inhibition
D.Allosteric inhibition

Concept Applied

When an inhibitor occupies the active site, it directly competes with the substrate for binding, which is the hallmark of competitive inhibition....

Read Full Step-by-Step Solution →

Question #34

Practice Question

A.Active site
B.Allosteric site
C.Cofactor
D.Substrate

Concept Applied

Competitive inhibitors compete with substrate for the active site....

Read Full Step-by-Step Solution →

Question #35

Practice Question

A.Phosphodiester bonds between sugar and base
B.Hydrogen bonds between phosphate and sugar
C.Phosphodiester bonds between sugar of one nucleotide and phosphate of the next
D.Glycosidic bonds between adjacent sugars

Concept Applied

The DNA backbone consists of alternating sugar and phosphate groups. Phosphodiester bonds link the 3' carbon of one deoxyribose sugar to the 5' carbon...

Read Full Step-by-Step Solution →

Question #36

Practice Question

A.It increases the Michaelis constant $K_m$ while $V_{\max}$ remains unchanged.
B.It decreases $K_m$ while $V_{\max}$ remains unchanged.
C.It decreases both $K_m$ and $V_{\max}$.
D.It increases both $K_m$ and $V_{\max}$.

Concept Applied

A competitive inhibitor competes with substrate for the active site, raising the apparent $K_m$ (lower affinity) but does not affect the maximum veloc...

Read Full Step-by-Step Solution →

Question #37

Practice Question

A.It decreases the Km without affecting Vmax
B.It decreases the Vmax without affecting Km
C.It increases both Km and Vmax
D.It increases Vmax while Km remains unchanged

Concept Applied

A competitive inhibitor binds reversibly to the active site, competing with the substrate. This raises the apparent Km (requires higher substrate conc...

Read Full Step-by-Step Solution →

Question #38

Practice Question

A.Glucose
B.Sucrose
C.Starch
D.Cellulose

Concept Applied

Sucrose is made of glucose and fructose; others are mono- or polysaccharides....

Read Full Step-by-Step Solution →

Question #39

Practice Question

A.Phosphate group, ribose sugar, nitrogenous base
B.Phosphate group, deoxyribose sugar, nitrogenous base
C.Sulfate group, ribose sugar, nitrogenous base
D.Phosphate group, glucose, nitrogenous base

Concept Applied

A DNA nucleotide consists of a phosphate group, a deoxyribose sugar, and a nitrogenous base (A, T, G, C). RNA has ribose instead of deoxyribose....

Read Full Step-by-Step Solution →

Question #40

Practice Question

A.Covalent bond
B.Hydrogen bond
C.Ionic bond
D.Peptide bond

Concept Applied

In nucleotides, the nitrogenous base is linked to the sugar via a β‑N‑glycosidic covalent bond, and the phosphate group forms phosphodiester covalent ...

Read Full Step-by-Step Solution →

Question #41

Practice Question

A.Krebs cycle
B.Oxidative phosphorylation
C.Glycolysis
D.Electron transport chain

Concept Applied

Glycolysis occurs in cytoplasm; Krebs cycle and ETC occur in mitochondria....

Read Full Step-by-Step Solution →

Question #42

Practice Question

A.Highly specific to substrate
B.May require cofactors
C.Destroyed by competitive inhibition
D.Altered by non-competitive inhibitors

Concept Applied

Competitive inhibition is reversible; active site is not destroyed....

Read Full Step-by-Step Solution →

Question #43

Practice Question

A.Triglycerides
B.Waxes
C.Phospholipids
D.Steroids

Concept Applied

Phospholipids have a phosphate head and two fatty acid tails....

Read Full Step-by-Step Solution →

Question #44

Practice Question

A.Glycosidic bond
B.Peptide bond
C.Phosphodiester bond
D.Hydrogen bond

Concept Applied

The phosphate group links the 3' carbon of one sugar to the 5' carbon of the next....

Read Full Step-by-Step Solution →

Question #45

Practice Question

A.Competitive inhibition
B.Non‑competitive inhibition
C.Uncompetitive inhibition
D.Allosteric inhibition

Concept Applied

When an inhibitor occupies the active site, it directly competes with the substrate for binding, which is the hallmark of competitive inhibition....

Read Full Step-by-Step Solution →

Question #46

Practice Question

A.Active site
B.Allosteric site
C.Cofactor
D.Substrate

Concept Applied

Competitive inhibitors compete with substrate for the active site....

Read Full Step-by-Step Solution →

Question #47

Practice Question

A.Phosphodiester bonds between sugar and base
B.Hydrogen bonds between phosphate and sugar
C.Phosphodiester bonds between sugar of one nucleotide and phosphate of the next
D.Glycosidic bonds between adjacent sugars

Concept Applied

The DNA backbone consists of alternating sugar and phosphate groups. Phosphodiester bonds link the 3' carbon of one deoxyribose sugar to the 5' carbon...

Read Full Step-by-Step Solution →

Question #48

Practice Question

A.It increases the Michaelis constant $K_m$ while $V_{\max}$ remains unchanged.
B.It decreases $K_m$ while $V_{\max}$ remains unchanged.
C.It decreases both $K_m$ and $V_{\max}$.
D.It increases both $K_m$ and $V_{\max}$.

Concept Applied

A competitive inhibitor competes with substrate for the active site, raising the apparent $K_m$ (lower affinity) but does not affect the maximum veloc...

Read Full Step-by-Step Solution →

Question #49

Practice Question

A.It decreases the Km without affecting Vmax
B.It decreases the Vmax without affecting Km
C.It increases both Km and Vmax
D.It increases Vmax while Km remains unchanged

Concept Applied

A competitive inhibitor binds reversibly to the active site, competing with the substrate. This raises the apparent Km (requires higher substrate conc...

Read Full Step-by-Step Solution →

Question #50

Practice Question

A.Glucose
B.Sucrose
C.Starch
D.Cellulose

Concept Applied

Sucrose is made of glucose and fructose; others are mono- or polysaccharides....

Read Full Step-by-Step Solution →
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