Biomolecules Test

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Biomolecules Test - 61

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Weekly Quiz Competition

Question 1
1 / -0

Glycosidic bond exists in DNA molecule between

A
Sugar and phosphate

B
Any two nitrogen bases

C
Sugar and nitrogen base

D
Purines and pyrimidines

Solution

In DNA and RNA the nitrogen base is attached to the sugar molecule to form the nucleoside. The sugars deoxyribose and ribose are linked to the nitrogenous base by glycosidic linkage. It is also known as N-glycosidic bond. Thus the correct answer is option C.
Question 2
1 / -0

Photosynthesis is an example of

A
Anabolism

B
Endergonic reactions

C
Both A and B

D
Exergonic reactions
Solution
- Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water. This glucose can be converted into pyruvate which releases adenosine triphosphate (ATP) by cellular respiration. Oxygen is also formed.
- Anabolic processes are processes that build up compounds. As photosynthesis build up glucose hence it is an anabolic process.
- An endergonic reaction requires or absorbs energy from its surroundings. Photosynthesis is an endergonic reaction. The energy required for photosynthesis comes from light hence endergonic.
- Hence Photosynthesis is an example of Anabolism and endergonic reactions.
- So, the correct answer is 'Both A and B'.
Question 3
1 / -0

The currency of energy in cell is

A
DNA.

B
RNA.

C
ATP.

D
Salts.

Solution

Correct Answer: C
Explanation:

ATP stands for adenosine triphosphate. It is known as the energy currency of the cell. It hydrolyzes to ADP and inorganic phosphate to provide energy for several metabolic reactions.
Question 4
1 / -0

Which of the following represents the correct sequence of nucleic acids considering their decreasing molecular weight?

A
DNA $$\rightarrow$$ mRNA $$\rightarrow$$ tRNA $$\rightarrow$$ rRNA

B
DNA $$\rightarrow$$ mRNA $$\rightarrow$$ rRNA $$\rightarrow$$ tRNA

C
DNA $$\rightarrow$$ rRNA $$\rightarrow$$ tRNA $$\rightarrow$$ mRNA

D
DNA $$\rightarrow$$ tRNA $$\rightarrow$$ nRNA $$\rightarrow $$ rRNA
Solution
- DNA is the genetic material present in the nucleus.
- This DNA is translated into RNA. RNA is generally of 3 types. mRNA, tRNA, and rRNA.
- The decreasing order of molecular weight is DNA $$\rightarrow$$ mRNA $$\rightarrow$$ rRNA $$\rightarrow$$ tRNA.
- DNA is the heaviest and tRNA is the lightest.
  Thus the correct answer is option B.
Question 5
1 / -0

Which of the following are the most abundant elements in the living cells?

A
C, H, S and P

B
C, O, N and P

C
C, H, O and N

D
C, H, Mg and Ca
Solution
- The most common elements in living things are carbon, hydrogen, oxygen, nitrogen.
- A carbohydrate is a biological molecule consisting of carbon (C), hydrogen (H), and oxygen (O) atoms.
- Proteins are made up of amino acids which are organic compounds that contain an amino group and carboxyl functional groups, along with a side chain (R group) specific to each amino acid.
- Each nucleotide consists of a nitrogen-containing aromatic base attached to a pentose sugar (C, H, and O), which is in turn attached to a phosphate group.
- So, major macromolecules consist of C, H, O, and N and hence, are the most abundant elements in living cells.
Thus, the correct answer is option (C).
Question 6
1 / -0

A simple enzyme is

A
Succinate dehydrogenase

B
Urease

C
Transaminase

D
Ribozyme

Solution

Simple enzymes consist of only proteins and catalyze their substrate specific reactions. Urease is an enzyme which is only made up of protein and it functions to catalyze the hydrolysis of urea which results in the formation of ammonia and carbon dioxide.
Succinate dehydrogenase is an enzyme complex consisting of four polypeptides (SDH A-D) which catalyses the conversion of succinate to fumarate during cellular respiration.
Transaminase signifies a group of enzymes which catalyze transamination reaction.
Ribozymes are also called catalytic RNAs. These are RNA enzymes catalyzing peptide bonding reaction during protein synthesis.
Thus, the correct answer is 'Urease is a simple enzyme'.
Question 7
1 / -0

Nitrogen is an important constituent of

A
Polyphosphates

B
Carbohydrates

C
Proteins

D
Lipids

Solution

Protein is made up of amino acids in which the main element present is Nitrogen. In all the amino acids, Nitrogen is present in the amino group. Thus, the correct option is C.
Question 8
1 / -0

Glycosidic linkage at place of branching in starch and glycogen is

A
$$\alpha 1 \longrightarrow 6$$

B
$$\alpha 1 \longrightarrow 4$$

C
$$\beta 1 \longrightarrow 4$$

D
$$\beta 1 \longrightarrow 6$$

Solution

The glycosidic linkage is a linkage when carbohydrates from the bond with another functional group or molecules by a covalent bond. Starch and glycogen are homopolysaccharides of glucose 1-4 alpha linkage forms during linear polymer and 1-6 alpha linkage during formation of branching. Thus, the correct option is A.
Question 9
1 / -0

Cellular pool comprises

A
Tens of biomolecules

B
Hundreds of biomolecules

C
Thousands of biomolecules

D
Hundred thousands of biomolecules

Solution

Cellular pool is the collection of thousands of biomolecules. It contains both organic and inorganic molecules. It is present in two phases, aqueous and non-aqueous phase. Aqueous phase comprises of crystalloids and collids dispersed in water. Non-aqueous phase comprises of chemicals deposited in cell membrane, cell wall.
Thus, the correct answer is option C.
Question 10
1 / -0

Biomolecules occur in the cellular pool as

A
Solutes in true solution

B
Colloids in colloidal solution

C
Insoluble in cellular-structure

D
All the above

Solution

Cellular pool is the collection of thousands of biomolecules. It contains both organic and inorganic molecules. It is present in two phases, aqueous and non-aqueous phase. Aqueous phase comprises of solute in true solution called as crystalloids and collids in colloidal solution. Non-aqueous phase comprises of insoluble chemicals in cellular structure like cell membrane, cell wall.
Thus, the correct answer is option D.

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Biomolecules Test - 61

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Biomolecules Test - 61

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SHARING IS CARING

Question 1

Sugar and phosphate

Any two nitrogen bases

Sugar and nitrogen base

Purines and pyrimidines

Solution

Question 2

Anabolism

Endergonic reactions

Both A and B

Exergonic reactions

Solution

Question 3

DNA.

RNA.

ATP.

Salts.

Solution

Question 4

DNA $$\rightarrow$$ mRNA $$\rightarrow$$ tRNA $$\rightarrow$$ rRNA

DNA $$\rightarrow$$ mRNA $$\rightarrow$$ rRNA $$\rightarrow$$ tRNA

DNA $$\rightarrow$$ rRNA $$\rightarrow$$ tRNA $$\rightarrow$$ mRNA

DNA $$\rightarrow$$ tRNA $$\rightarrow$$ nRNA $$\rightarrow $$ rRNA

Solution

Question 5

C, H, S and P

C, O, N and P

C, H, O and N

C, H, Mg and Ca

Solution

Question 6

Succinate dehydrogenase

Urease

Transaminase

Ribozyme

Solution

Question 7

Polyphosphates

Carbohydrates

Proteins

Lipids

Solution

Question 8

$$\alpha 1 \longrightarrow 6$$

$$\alpha 1 \longrightarrow 4$$

$$\beta 1 \longrightarrow 4$$

$$\beta 1 \longrightarrow 6$$

Solution

Question 9

Tens of biomolecules

Hundreds of biomolecules

Thousands of biomolecules

Hundred thousands of biomolecules

Solution

Question 10

Solutes in true solution

Colloids in colloidal solution

Insoluble in cellular-structure

All the above

Solution

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