Biomolecules Test

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Biomolecules Test - 27

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Weekly Quiz Competition

Question 1
1 / -0

The building block of proteins and enzymes is

A
Amino acids

B
Steroids

C
Mineralocorticoids

D
None of the above

Solution

Amino acids are organic acids with carboxylic group -COOH and amino group −NH$$_2$$. They are attached to alpha carbon or next carbon to the carboxylic group. This provides an acidic property to the amino acids. While amino group gives it a basic property. Amino acids are building block of proteins and enzymes. Steroid are complex compounds of cell membrane and are essential for the production of hormone-in animals.
Thus, the correct answer is option A.
Question 2
1 / -0

Most membrane functions are carried out by

A
proteins

B
phospholipids

C
nucleic acids

D
hormones

Solution

The cell membranes of multicellular organisms usually have a number of proteins embedded in their phospholipid bilayer that perform various functions like transport of molecules, reception and recognition of molecules, etc. These proteins are responsible for the majority of the functions that a cell performs.

So, the correct answer is 'proteins'.
Question 3
1 / -0

Water is not considered as biomolecules because

A
Water has inorganic materials

B
Water has organic materials

C
Biomolecules includes the molecules that contain carbon in living tissues

D
Water do not contain DNA and RNA

Solution

Biomolecules are basically all the carbon compounds obtained from living tissue. All the major components that make up a living being that is the carbohydrate, proteins, lipids contain carbon in one form or the other.
Carbon is the structural as well as the functional unit of the basic framework of the cell.

So, the correct option is C
Question 4
1 / -0

An enzyme promotes a chemical reaction by

A
lowering the energy of activation

B
changing the free energy difference between substrate and product

C
increasing molecular motion

D
all of these.

Solution

There are so many reactions occurring inside the living body that the activation energy of all these reactions cannot be supplied. So, enzymes decrease the activation energy of the reaction and thus increase the speed of the reaction.
So, the correct option is 'lowering the energy of activation'
Question 5
1 / -0

Which of the following is not the organic biomolecule?

A
Lipids

B
Carbohydrates

C
Proteins

D
Minerals

Solution

Lipids, carbohydrates, proteins, vitamins, etc. all are the organic biomolecule.
Minerals are the inorganic biomolecule.
Question 6
1 / -0

The term metabolism indicates a variety reactions carried out at

A
atomic level

B
molecular level

C
cellular level

D
tissue level

Solution

The metabolism is a chemical processes that occur within a living organism in order to maintain life and basic unit of life is cell, hence all metabolic reactions occur in cell. So, the correct option is 'Cellular level'
Question 7
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What are biochemical reactions in the body known as?

A
Anabolic reactions

B
Metabolic reactions

C
Catabolic reactions

D
Vital reactions

Solution

All the chemical processes which sustain life. (all cells) Sum of all the chemical reactions that take place in the body, consisting of anabolism and catabolism. Cellular metabolism refers specifically to the chemical reactions within cells. So, the correct option is "B" (Metabolic reactions).
Question 8
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What type of forces bind the substrate to the active site of enzyme?
(i) Ionic bonding
(ii) Hydrogen bonding
(iii) van der Waals forces
(iv) Reaction with functional group of enzymes

A
(i), (ii) and (iv)

B
(i) and (ii)

C
(i), (ii) and (iii)

D
(i), (ii) (iii) and (iv)

Solution

Substances bind to the active of the enzyme through ionic bonding, hydrogen bonding, van der Waals interaction or dipole-dipole interaction.
Question 9
1 / -0

In which of the following groups all are polysaccharides?

A
Sucrose, glucose and fructose

B
Maltose, lactose and fructose

C
Glycogen, sucrose and maltose

D
Glycogen, cellulose and starch.

Solution

Polysaccharides: It consists of more than six molecules of a monosaccharide joined together by glycosidic bonds with a loss of water each time a monosaccharide is added.
A. Sucrose: disaccharide , glucose:monosaccharide ,Frustose:monosaccharide .
B. Maltose:disaccharide ,lactose:disaccharide , Frustose:monosaccharide.
C. Glycogen:Polysaccharides,Sucrose: disaccharide, Maltose:disaccharide.
D. Glycogen: Polysaccharides, Cellulose: Polysaccharides, Starch: Polysaccharides
So, the correct answer is 'Glycogen, cellulose and starch'.

Question 10

1 / -0

The conversion of maltose into glucose is possible by the enzyme:

zymase

lactase

maltase

diastase

Solution

Correct Answer: C
Hint: Enzymes are specific for each kind of biochemical reaction.
Properties of enzymes-
1.       All enzymes are specific for their substrate.
2.       Enzymes are reversible, that is , have temporary attachment with the substrate.
3.       Enzymes are sensitive to heat, temperature and pH
The conversion of maltose to glucose is bought about by maltase.

Correct answer is option $$C$$

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Biomolecules Test - 27

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Biomolecules Test - 27

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SHARING IS CARING

Question 1

Amino acids

Steroids

Mineralocorticoids

None of the above

Solution

Question 2

proteins

phospholipids

nucleic acids

hormones

Solution

Question 3

Water has inorganic materials

Water has organic materials

Biomolecules includes the molecules that contain carbon in living tissues

Water do not contain DNA and RNA

Solution

Question 4

lowering the energy of activation

changing the free energy difference between substrate and product

increasing molecular motion

all of these.

Solution

Question 5

Lipids

Carbohydrates

Proteins

Minerals

Solution

Question 6

atomic level

molecular level

cellular level

tissue level

Solution

Question 7

Anabolic reactions

Metabolic reactions

Catabolic reactions

Vital reactions

Solution

Question 8

(i), (ii) and (iv)

(i) and (ii)

(i), (ii) and (iii)

(i), (ii) (iii) and (iv)

Solution

Question 9

Sucrose, glucose and fructose

Maltose, lactose and fructose

Glycogen, sucrose and maltose

Glycogen, cellulose and starch.

Solution

Question 10

zymase

lactase

maltase

diastase

Solution

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