Biomolecules Test

Result

Biomolecules Test - 83

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is not a macromolecule?

A
Nucleic acid

B
Starch

C
Protein

D
Sucrose

Solution
Question 2
1 / -0

Which of the following statement is not correct?

A
All proteins are polymers of $$\alpha-$$amino acids.

B
Glycogen is the food reserve of plants.

C
Cellulose is a linear polymer of $$\beta-$$glucose.

D
Amylopection is a branched polymer of $$\alpha-$$glucose.

Solution
Question 3
1 / -0

Thew correct order and staement for histidine are:

A
q > p ......basic nature

B
r > p........ basic nature

C
Histidine has $$8\pi $$ electrons delocalized in the ring

D
All stereoisomers of Histidine have different $$p{k_{a1}}$$ values

Solution
Question 4
1 / -0

Which of the following dissaccharide is the $$\alpha$$-anomer of $$4-O-$$($$\beta$$-D-glucopyranosyl)-D-glucopyranose?

A

B

C

D
Question 5
1 / -0

Which one of the following statements is incorrect ?

A
Competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex

B
The presence of the competitive inhibitor decreases the $$K_m$$ of the enzyme for the substrate.

C
A competative inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex

D
In competative inhibition the inhibitor molecule is not chemically changed by the enzyme.
Question 6
1 / -0

$$\alpha -D-$$Glucose and $$\beta -D-$$Glucose are not :-

A
Epimers

B
Anomers

C
Enantiomers

D
Diastereomers

Solution
Question 7
1 / -0

Statement-I : Lac operon explains the regulation of enzyme synthesis by the substrate.
Statement-II : In any operon, the regulatory gene must be always located very close to structural genes.

A
Both Statement I and Statement II are correct

B
Statement I is correct and Statement II is wrong

C
Statement I is wrong and Statement II is correct

D
Both Statement I and Statement II are wrong
Question 8
1 / -0

Which can give both carbylamine test and carric ammonium nitrate test ?

A
Asn-Gln

B
Lys-Gln

C
Asp-Lys

D
Lys-Ser

Solution

Solution:- (D) Lys-Ser
In Lys-ser, amine and alcoholic group are present respectively hence it will show positive test with carbyl amine and cerric ammonium nitrate
Question 9
1 / -0

Ammonia is always added in this reaction. Which of the following must be incorrect?

A
$$ NH_{3}$$ combines with $$ Ag^{+}$$ to form a complex

B
$$ Ag(NH_{3})_{2}^{+} $$ is a stronger oxidizing agent than $$ Ag^{+} $$

C
In absence of ammonia, silver salt of gluconic acid is formed

D
$$ NH_{3} $$ has affected the standard reduction potential of glucose-gluconic acid electrode

Solution
Question 10
1 / -0

What is the gain of ATP molecules during aerobic oxidation of one glucose molecule ?

A
$$32$$

B
$$16$$

C
$$36$$

D
$$18$$

Solution