2. Amino Acids

Question 1

Topic - Amino Acids

Answer 1

@ A typical Amino Acid
@ α-carbon atom
@ Substituted _
@ R group decides _
@ Diff R group named
@ Simplest Amino Acid
@ Total no. of Amino Acid

Question 2

A typical amino acid is formed of:

Answer 2

I. 1 Amino group (-NH2)
II. 1 Acid group (-COOH)
III. 1 Hydrogen
IV. 1 Variable group (R)

Question 3

The groups –NH2 & –COOH are attached to the same carbon atom (α-carbon).
Hence they are called ______.

Answer 3

α-amino acids

Question 4

Amino acids are substituted methanes.
T/F

Answer 4

True

Question 5

Many amino acids exist based on the nature of the (-R) group.
T/F

Answer 5

True,
R group decides the physical & chemical properties of Amino Acids

Question 6

*Structures and Name:

I. Hydrogen as R group -
II. Methyl as R group -
III. Hydroxy methyl as R group -

Answer 6

I. Glycine
II. Alanine
III. Serine

Question 7

The simplest Amino acids that do not show optical activity is -

Answer 7

Glycine

Question 8

____ no. of types of Amino acids are used for protein synthesis.

Answer 8

20
(10 are Essential & 10 are Non-essential)

Question 9

Topic - Types of Amino acids

Answer 9

@ Types of Amino Acid
@ Examples of Acid/Base/Neutral
@ Examples of Aromatic

Question 10

Types of Amino acids:

I. (More -COOH group)
II. (More -NH3 group)
III. (-COOH & -NH3 group in equal no.)

Answer 10

I. Acidic amino acids
II. Basic amino acids
III. Neutral amino acids

Question 11

Examples of Acidic Amino Acids:

Answer 11

a. Glutamic acid
b. Aspartic acid

Question 12

Examples of Basic Amino Acids.

Answer 12

Lysine, Arginine

Question 13

Examples of Neutral Amino acids.

Answer 13

Valine

Question 14

Examples of some amino acids that are aromatic.

Answer 14

I. Tyrosine
II. Phenylalanine
III. Tryptophan

Question 15

Topic - Zwitter Ion

Answer 15

@ Diff pH
@ _ nature
@ Zwitter Ion charge
@ Isoelectric point

Question 16

The structure of amino acids changes in aqueous solutions of different pH.
Why?

Answer 16

Because Amino acids have ionizable nature of -NH2 and -COOH groups.

Question 17

Under neutral conditions, Amino acids can behave as _____ ion at _____ point.

Answer 17

Zwitter ion; Isoelectric point

Question 18

The isoelectric point is:

Answer 18

It is pH when net charge on Zwitter ion is zero

Question 19

The charge on a zwitterionic form is neutral but contains both positive and negative charges.
T/F

Answer 19

True

Question 20

Topic - Essential/non-essential Amino acids

Answer 20

@ Essential Amino Acids
@ Its Examples
@ Non-essential Amino Acids
@ Its Examples

Question 21

______ cannot be synthesized by the body and should be supplied through diet.
Examples.

Answer 21

Examples of Essential amino acids:
I. Lysine
II. Leucine
III. Isoleucine
IV. Tryptophan
V. Phenylalanine

Question 22

______ can be synthesized by the body.
Examples.

Answer 22

Examples of Non-essential amino acids:
I. Arginine
II. Histidine