Biomolecules Test

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Biomolecules Test - 71

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Weekly Quiz Competition

Question 1
1 / -0

The commonest disaccharide has the molecular formula:

A
$$C_{10}H_{18}O_{9}$$

B
$$C_{10}H_{20}O_{10}$$

C
$$C_{11}H_{22}O_{11}$$

D
$$C_{12}H_{22}O_{11}$$
Solution
$$\text{Disaccharides are the carbohydrates which on hydrolysis gives two same or different carbohydrates. }$$
$$Sucrose\text{ is the most common disaccharide.}$$ It can be found in many fruits and is naturally occuring.
It has molecular formula $$C_{12}H_{22}O_{11}.$$
Option D is correct.
Question 2
1 / -0

Which substance chars when heated with conc. $$H_2SO_4$$ ?

A
Carbohydrate

B
Hydrocarbon

C
Fat

D
Protein

Solution

Carbohydrates chars when heated with conc. sulphuric acid. It is due to dehydration.
Question 3
1 / -0

Which of the following amino acids is optically inactive?

A
Phenyl alanine

B
Glycine

C
Glutamic acid

D
Asparagine

Solution

Glycine is the simplest amino acid and is the only amino acid that is not optically active (it has no stereoisomers).
Question 4
1 / -0

Which of the following is the sweetest sugar?

A
Sucrose

B
Glucose

C
Fructose

D
Maltose

Solution

Fructose is the sweetest sugar.
Question 5
1 / -0

Monomer of nucleic acid is

A
nucleotides

B
nucleosides

C
amino acids

D
carboxylic acid

Solution

The term nucleic acid is the overall name for DNA and RNA. They are composed of nucleotides, which are the monomers made of three components: a 5-carbon sugar, a phosphate group and a nitrogenous base.
Question 6
1 / -0

Which of the following hormones contains iodine?

A
Testosterone

B
Adrenaline

C
Thyroxine

D
Insulin

Solution

Thyroxine hormone contains iodine. The thyroid gland produces two primary hormones - thyroxine (also referred to as $T 4$ ) and tri-iodothyronine (also referred to as $T 3$ ). The numbers 3 and 4 refer to the number of atoms of iodine in the hormones. Iodine is essential for the production of thyroid hormones. Iodine is found in most foods, especially seafood.
Question 7
1 / -0

Which one of the following vitamins is water soluble?

A
vitamin K

B
vitamin A

C
vitamin B

D
vitamin E

Solution

Vitamin B is water soluble.
Question 8
1 / -0

A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?

A
Three

B
Four

C
One

D
Two

Solution

A sequence of three nucleotides in messenger RNA makes a codon for an amino acid. A codon is a sequence of three adjacent nucleotides constituting the genetic code that determines the insertion of a specific amino acid in a polypeptide chain during protein synthesis or the signal to stop protein synthesis.
Question 9
1 / -0

The formation of starch in plants results from

A
photosynthesis

B
photolysis

C
flash photolysis

D
none of the above

Solution

Reaction taking place during Photosynthesis:

$$6CO_2 + 6H_2O \rightarrow \underset{Glucose}{C_6H_{12}O_6} + 6O_2$$

This Glucose polymerise and form starch.
Hence, The formation of starch in plants results from Photosynthesis.

Hence, Option"A" is correct answer
Question 10
1 / -0

A carbohydrates consists of

A
C and O

B
C,H and O

C
C,H,N and O

D
C and H

Solution

Carbohydrates (also called saccharides) are molecular compounds made from just three elements: $$\text{Carbon, Hydrogen and Oxygen.}$$

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 71

Result

Biomolecules Test - 71

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SHARING IS CARING

Question 1

$$C_{10}H_{18}O_{9}$$

$$C_{10}H_{20}O_{10}$$

$$C_{11}H_{22}O_{11}$$

$$C_{12}H_{22}O_{11}$$

Solution

Question 2

Carbohydrate

Hydrocarbon

Fat

Protein

Solution

Carbohydrates chars when heated with conc. sulphuric acid. It is due to dehydration.

Question 3

Phenyl alanine

Glycine

Glutamic acid

Asparagine

Solution

Question 4

Sucrose

Glucose

Fructose

Maltose

Solution

Question 5

nucleotides

nucleosides

amino acids

carboxylic acid

Solution

Question 6

Testosterone

Adrenaline

Thyroxine

Insulin

Solution

Question 7

vitamin K

vitamin A

vitamin B

vitamin E

Solution

Question 8

Three

Four

One

Two

Solution

Question 9

photosynthesis

photolysis

flash photolysis

none of the above

Solution

Question 10

C and O

C,H and O

C,H,N and O

C and H

Solution

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