Biomolecules Test

Result

Biomolecules Test - 88

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which $$\alpha$$ amino acid can cross link peptide chains

A
Serine

B
Cysteine

C
Protein

D
Carbohydrate

Solution

the correct answer is B.
$$\text{In some proteins, the linear polypeptide chain is cross-linked. The most common cross-links are disulfide bonds,}$$ $$\text{formed by the oxidation of a pair of cysteine residues }$$
Question 2
1 / -0

The optically inactive amino acid is

A
Lysine

B
Glycine

C
Arginine

D
Alanine

Solution

All amino acids have an amine and a carboxyl group They also have a functional group which is unique to each of them. $$\text{Depending on the polarity of the functional group the amino acid can be rendered optically inactive or active.}$$ $$\text{The simplest of all amino acids, Glycine which has H as a functional group lacks optical acitivity,}$$ as the saturated alpha carbon is unsubstituted. Others among the 20 amino acids have D or L stereoisomers. So, the correct answer is 'Glycine'.
Question 3
1 / -0

Galactose is converted into glucose in

A
Mouth

B
Stomach

C
Liver

D
Intestine

Solution

$$\text{In the liver, galactose is converted to glucose-6-phosphate in order to enter the glycolytic pathway.}$$
Question 4
1 / -0

Which substance is not present in nucleic acid

A
Cytosine

B
Adenine

C
Thymine

D
Guanidine

Solution

The answer is (D). $$\text{Guanidin is not present in nucleic acid}$$ and as $$\text{cytosine, Adenine, Thymine and Guanine}$$ are the four main bases found in nucleic acid. Adenine and Guanine are purines while thymine and cytosine are pyrimidines. They together form triple bonded histones of DNA. $$\text{Guanidine is another compound which has a chemical formula }$$$$HNC.$$
Question 5
1 / -0

Vitamin A is present in

A
Cod liver oil

B
Carrot

C
Milk

D
In all of these

Solution

Concentrations of vitamin A are highest in liver and fish oils. Other sources of vitamin A are milk and eggs, which also include some provitamin A Most dietary provitamin A comes from leafy green vegetables, orange and yellow vegetables(Carrot), tomato products, fruits, and some vegetable oils.
Question 6
1 / -0

In RNA , nitrogen bases are

A
Adenine and guanine and cytosine and thymine

B
Adenine and guanine and thymine and cytosine

C
Adenine and thymine and guanine and cytosine

D
Adenine and guanine and uracil and cytosine

Solution
Question 7
1 / -0

Nucleic acid are

A
Small molecules

B
dipepetides

C
Long chain polymers of nuceotides

D
Polypeptides

Solution

Nucleic acid are Long chain polymers of nucleotides hence they are also called polynucleotides.
Hence option (C) is correct.
Question 8
1 / -0

Which of the following is the correct statement?

A
Starch is a polymer of $$\alpha-$$glucose.

B
Amylose is not a component of starch.

C
Proteins are composed of only one type of amino acid.

D
In the cyclic structure of fructose, there are five carbon atoms and one oxygen atom.

Solution
Question 9
1 / -0

Which of the following statements is not correct?

A
Proteins are polyamides formed from amino acids.

B
Except glycine, all other amino acids show optical activity

C
Natural proteins are commonly made up of $$L-$$ isomer of amino acids.

D
In $$\alpha-$$ amino acids, $$-NH_{2}$$ and $$-COOH$$ groups are attached to different carbon atoms.

Solution

In $$\alpha-$$ amino acids $$-NH_{2}$$ and $$-COOH$$ groups are attached to the same carbon atom,
Question 10
1 / -0

Which of the following vitamins is water soluble

A
Vitamin $$E$$

B
Vitamin $$D$$

C
Riboflavin

D
Retinol

Solution

Riboflavin (vitamin $$B_2)$$ is water soluble vitamin. All other vitamins (vitamins $$K$$) and retinol (vitamin $$A$$) are fat soluble vitamins.
Hence option (C) is correct.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Biomolecules Test - 88

Result

Biomolecules Test - 88

Score

-

Rank

-

SHARING IS CARING

Question 1

Serine

Cysteine

Protein

Carbohydrate

Solution

Question 2

Lysine

Glycine

Arginine

Alanine

Solution

Question 3

Mouth

Stomach

Liver

Intestine

Solution

Question 4

Cytosine

Adenine

Thymine

Guanidine

Solution

Question 5

Cod liver oil

Carrot

Milk

In all of these

Solution

Question 6

Adenine and guanine and cytosine and thymine

Adenine and guanine and thymine and cytosine

Adenine and thymine and guanine and cytosine

Adenine and guanine and uracil and cytosine

Solution

Question 7

Small molecules

dipepetides

Long chain polymers of nuceotides

Polypeptides

Solution

Question 8

Starch is a polymer of $$\alpha-$$glucose.

Amylose is not a component of starch.

Proteins are composed of only one type of amino acid.

In the cyclic structure of fructose, there are five carbon atoms and one oxygen atom.

Solution

Question 9

Proteins are polyamides formed from amino acids.

Except glycine, all other amino acids show optical activity

Natural proteins are commonly made up of $$L-$$ isomer of amino acids.

In $$\alpha-$$ amino acids, $$-NH_{2}$$ and $$-COOH$$ groups are attached to different carbon atoms.

Solution

Question 10

Vitamin $$E$$

Vitamin $$D$$

Riboflavin

Retinol

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.