Biomolecules Test

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Biomolecules Test - 73

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Weekly Quiz Competition

Question 1
1 / -0

Class of enzymes contained in lysosomes is

A
Lyases

B
Ligases

C
Hydrolases

D
Transferases

Solution

A lysosome is a membrane-bound organelle found in nearly all animal cells. They are spherical vesicles which contain hydrolytic enzymes that can break down many kinds of biomolecules. So, the correct answer is option C.
Question 2
1 / -0

The catalytic efficiency of two different enzymes can be compared by the

A
Formation of the product

B
pH of optimum value

C
k$$_m$$ value

D
Molecular size of the enzyme
Solution
Correct Option: C
Explanation:
$${K_m}$$ value is used to compare the catalytic efficiency of two different enzymes.
It is also called the Michaelis Menten constant.
It is the substrate concentration at which the reaction rate is at half maximum.
In other words, it describes the affinity of an enzyme for a substrate molecule.
If the affinity is high then the $${K_m}$$ is low, meaning that the reaction can reach half at maximum with fewer substrate molecules.
Question 3
1 / -0

Nucleic acids were discovered by

A
Watson and Crick

B
Khorana

C
Wilkins

D
Miescher

Solution

Nucleic acids were first discovered by Friedrich Miescher. It was first seen in the nuclei of white blood cells. It was named as nuclein as it was obtained from the nuclei. The two nucleic acid are known as DNA and RNA. DNA is mainly present in the nucleus while RNA is majorly found in nucleolus. It helps in the genetic inheritance of characters. Altman discovered the acidic nature of the nucleic acids.
So, the correct answer is option D.
Question 4
1 / -0

In human prefoetal stage the globins are

A
One

B
Two

C
Three

D
Four

Solution

In humans, implantation is the stage of pregnancy at which the embryo adheres to the wall of the uterus. At this stage of prenatal development, the conceptus is called a blastocyst. It is by this adhesion that the embryo receives oxygen and nutrients from the mother to be able to grow. This stage has three globins.
So, the correct answer is 'Three.'
Question 5
1 / -0

Many pathogens produce cellulolytic, enzymes which act upon the host cell wall. The correct sequence of the given cellulolytic enzymes that are involved in the breakdown of cellulose is?

A
Cellobiase, $$C_1$$ enzyme, Cx enzyme

B
Cellobiase, Cx enzyme, $$C_1$$ enzyme

C
$$C_1$$ enzyme, Cx enzyme, Cellobiase

D
Cx enzyme, $$C_1$$ enzyme, Cellobiase

Solution

Enzymatic hydrolysis of cellulose is an important reaction in nature for it marks the first step in the decay of cellulose, the most abundantly occurring organic material by which many pathogens enter the host cell wall. Whitaker (1953-1954) has concluded that his Myrothecium verrucaria cellulase is a single enzyme capable of hydrolyzing native cellulose C1 enzyme followed by Cx enzyme then at last cellobiase . Cellobiase is involved in the last step of the process of breaking down cellulose, a molecule made up of bundled long chains of glucose that are found in plant cell walls, to glucose. This is a natural process that is used by fungi to produce glucose as a food source.
So, the correct option is 'C'.
Question 6
1 / -0

Which one is not a commercial energy?

A
Coal

B
Animal power

C
Petroleum and natural gas

D
Electricity

Solution

Commercial energy is obtained to the users at some price and is used mostly for commercial purposes. It is a non-renewable form of energy. Where as, non-commercial energy is a renewable form, obtained from cow dung, fire wood and agricultural waste.
So the correct option is 'Animal power'
Question 7
1 / -0

A regulatory gene produces some kind of protein through its mRNA that controls the activity of the operator gene which signals the formation of specific enzymes required for the metabolic breakdown of the food. How does that protein regulate the activity of the operator gene?

A
The repressor protein produced after combining with an inducer activates the operator gene

B
The repressor protein produced after combining with a co repressor activates the operator gene

C
The catabolic activator protein(CAP) produced activates the operator gene

D
The mutated repressor protein produced activates the operator gene

Solution

when repressor not able to block operator gene ,operator gene remain functional.active protein produced by regulator gene act on E.coli operon system.so correct option is D
Question 8
1 / -0

Which one of the following is not a thermostable enzyme?

A
Taq DNA polymerase

B
RNA polymerase

C
Pfu DNA polymerase

D
Vent polymerase
Question 9
1 / -0

2% of adult globin in humans is made of

A
$$\alpha_2, \varepsilon_2$$

B
$$\zeta_2, \gamma_2$$

C
$$\alpha_2, \delta_2$$

D
$$\alpha_2, \gamma_2$$

Solution

In the normal adult, hemoglobin A, which is composed of two alpha and two beta globins ($${A}^{2}{Β}^{2}$$), is the most prevalent, comprising about 95% of all hemoglobin. Two minor hemoglobins also occur: hemoglobin $${A}_{2}$$, composed of two alpha and two delta globins ($${α}^{2}{δ}^{2}$$) comprises 2-3.5% of hemoglobin, while hemoglobin F, composed of two alpha and two gamma globins ($${α}^{2}{γ}^{2}$$) comprises less than 2% of hemoglobin.
So, the correct answer is '$${α}_{2},{δ}_{2}$$.'
Question 10
1 / -0

Living organisms contain only ________________.

A
L-amino acids and L-sugars

B
L-amino acids and D-sugars

C
D-amino acids and D-sugars

D
D0amino acids and L-sugars

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 73

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Biomolecules Test - 73

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SHARING IS CARING

Question 1

Lyases

Ligases

Hydrolases

Transferases

Solution

Question 2

Formation of the product

pH of optimum value

k$$_m$$ value

Molecular size of the enzyme

Solution

Question 3

Watson and Crick

Khorana

Wilkins

Miescher

Solution

Question 4

One

Two

Three

Four

Solution

Question 5

Cellobiase, $$C_1$$ enzyme, Cx enzyme

Cellobiase, Cx enzyme, $$C_1$$ enzyme

$$C_1$$ enzyme, Cx enzyme, Cellobiase

Cx enzyme, $$C_1$$ enzyme, Cellobiase

Solution

Question 6

Coal

Animal power

Petroleum and natural gas

Electricity

Solution

Question 7

The repressor protein produced after combining with an inducer activates the operator gene

The repressor protein produced after combining with a co repressor activates the operator gene

The catabolic activator protein(CAP) produced activates the operator gene

The mutated repressor protein produced activates the operator gene

Solution

Question 8

Taq DNA polymerase

RNA polymerase

Pfu DNA polymerase

Vent polymerase

Question 9

$$\alpha_2, \varepsilon_2$$

$$\zeta_2, \gamma_2$$

$$\alpha_2, \delta_2$$

$$\alpha_2, \gamma_2$$

Solution

Question 10

L-amino acids and L-sugars

L-amino acids and D-sugars

D-amino acids and D-sugars

D0amino acids and L-sugars

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