Biomolecules Test

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Biomolecules Test - 49

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Weekly Quiz Competition

Question 1
1 / -0

The assimilatory power in photosynthesis is

A
ATP.

B
NADPH.

C
ATP and NADPH$$_2$$.

D
ATP, NAPDH and CO$$_2$$.

Solution

The phase of reactions in photosynthesis which involves the direct sunlight is called light reaction. This reaction takes place inside the grana of chloroplast. In this reaction assimilatory power ATP and NADPH$$_2$$ are generated with evolution of oxygen and photolysis of water. These assimilatory powers help in the fixation of carbon dioxide during dark phase reaction.
Question 2
1 / -0

Which of the following elements is needed as a component in cell membranes, nucleic acids and energy transfer?

A
Sulphur

B
Phosphorus

C
Calcium

D
Potassium

Solution

Phosphorus is a constituent of cell membranes, certain proteins, all nucleic acids and nucleotides. This element is involved in energy transfer such as ATP and ADP and activates coenzymes for amino acid production which is necessary for protein synthesis. Further phosphorous is also a required for other metabolic processes such as photosynthesis, glycolysis, respiration and fatty acid synthesis.
Therefore, the correct answer is option B.
Question 3
1 / -0

Which of the following statement is true?

A
Adenine has 5 nitrogen atoms

B
Cytosine has 8 nitrogen atoms

C
Guanine has 3 nitrogen atoms

D
Uracil has 5 nitrogen atoms

Solution

Adenine is an important building block for life. It is one of four nitrogenous bases found in deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Adenine belongs to a nucleotide group called purines. A purine consists of a six-membered nitrogen ring fused to a five-membered nitrogen ring.
Question 4
1 / -0

The total number of nitrogenous bases in human genome is estimated to be about

A
35 thousands

B
3.5 million

C
35 million

D
3.l billion

Solution

Genome size is usually stated as the total number of base pairs. The human genome contains roughly 3.1 billion base pairs. All genes are arranged linearly along the chromosomes. The complete set of instructions for making an organism is called as its genome.
Question 5
1 / -0

Which of the following is a good source of proteins?

A
Egg

B
Rice

C
Water

D
Potato

Solution

Protein is a structural component of a cell. The rich sources of proteins are egg, milk, yoghurt, fish and sea food, soya, pistachio nuts, pork, chicken and turkey.
Rice and potatoes are the starchy foods and are good source of carbohydrates. Starchy foods are a good source of energy and the main source of a range of nutrients in our diet.
Water mainly constitutes hydrogen and oxygen and it is devoid of proteins.
So, the correct answer is option A.
Question 6
1 / -0

Which of the following set of three items are true, as each set belongs to the category mentioned against them?

A
Lysine, glycine, thiamine - Amino acids

B
Myosin, oxytocin and gastrin - Hormones

C
Rennin, helicase and hyaluronidase - Enzyme

D
Optic nerve, oculomotor, vagus - Sensory nerves

Solution

Rennin is a protease found in rennet. It is produced by newborn ruminant animals in the lining of the fourth stomach to curdle the milk they ingest, allowing a longer residence in the bowels and better absorption. It is widely used in the production of cheese.
Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes. There are DNA and RNA helicases. DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied.
Hyaluronidase is a protein enzyme. It works by causing rapid spreading of injected fluid into the body, which increases the absorption of injected fluids.
Therefore, the correct answer is option C.
Question 7
1 / -0

Who coined the term zymase?

A
Pasteur

B
Buchner

C
Kuhne

D
Sumner

Solution

Buchner coined the term zymase for the complex of biocatalysts extracted from yeast and taking part in alcoholic fermentation. Pasteur is responsible for the process of pasteurization and Kuhne is best known today for coining the word enzyme.
Question 8
1 / -0

In our body, _________ act as catalysts.

A
vitamins

B
minerals

C
enzymes

D
water
Solution
Enzyme:-Enzymes are very efficient catalysts for biochemical reactions. They speed up reactions by providing an alternative reaction pathway of lower activation energy.
Vitamins and minerals:- Vitamins and minerals are considered essential nutrients
They help shore up bones, heal wounds, and bolster your immune system. They also convert food into energy and repair cellular damage.
Water:- Drinking Water Helps Maintain the Balance of Body Fluids
The functions of these bodily fluids include digestion, absorption, circulation, a creation of saliva, transportation of nutrients, and maintenance of body temperature.
Thus, in our body, enzymes act as a catalyst.
Question 9
1 / -0

The given graph shows the effect of substrate concentration on the rate of reaction of the enzyme, green gram-phosphatase. What does the graph indicate?

A
The rate of enzyme reaction is directly proportional to the substrate concentration.

B
Presence of an enzyme inhibitor in the reaction mixture.

C
Formation of an enzyme-substrate complex.

D
At higher substrate concentration, the pH increases.

Solution

From the graph, it is clear that the rate of the enzyme reaction is directly proportional to the substrate concentration. This graph indicates the effect of substrate concentration on the velocity of enzyme action. Increasing substrate concentration increases the rate of reaction. This is because more substrate molecules will be colliding with enzyme molecules, so more product will be formed. However, after a certain concentration, any increase will have no effect on the rate of reaction, since substrate concentration will no longer be the limiting factor. The enzymes will effectively become saturated and will be working at their maximum possible rate. Increasing enzyme concentration will increase the rate of reaction, as more enzymes will be colliding with substrate molecules.
So, the correct answer is option C
Question 10
1 / -0

High energy bond of ATP are present in between

A
C-C

B
C-O

C
C-N

D
O-P

Solution

ATP is made of three phosphate bonds attached to adenine. Whenever, these bonds are hydrolysed, one of the phosphate bonds (O-P bond) breaks releasing huge amount of energy. This energy is used by every cell to carry out its normal physiological functions. ATP is regenerated in the cell using energy from hydrolysing glucose.
Therefore, the correct answer is option D.

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 49

Result

Biomolecules Test - 49

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SHARING IS CARING

Question 1

ATP.

NADPH.

ATP and NADPH$$_2$$.

ATP, NAPDH and CO$$_2$$.

Solution

Question 2

Sulphur

Phosphorus

Calcium

Potassium

Solution

Question 3

Adenine has 5 nitrogen atoms

Cytosine has 8 nitrogen atoms

Guanine has 3 nitrogen atoms

Uracil has 5 nitrogen atoms

Solution

Question 4

35 thousands

3.5 million

35 million

3.l billion

Solution

Question 5

Egg

Rice

Water

Potato

Solution

Question 6

Lysine, glycine, thiamine - Amino acids

Myosin, oxytocin and gastrin - Hormones

Rennin, helicase and hyaluronidase - Enzyme

Optic nerve, oculomotor, vagus - Sensory nerves

Solution

Question 7

Pasteur

Buchner

Kuhne

Sumner

Solution

Question 8

vitamins

minerals

enzymes

water

Solution

Question 9

The rate of enzyme reaction is directly proportional to the substrate concentration.

Presence of an enzyme inhibitor in the reaction mixture.

Formation of an enzyme-substrate complex.

At higher substrate concentration, the pH increases.

Solution

Question 10

C-C

C-O

C-N

O-P

Solution

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