43 + Mcqs in Biochemistry of cell Page 1 McqOptions

1.	What are the following is not a factor responsible for denaturation of proteins?
A.	pH change
B.	Organic solvents
C.	Heat
D.	Charge
Answer» E.

Discussion

2.	Unfolding of a protein can be termed as
A.	Renaturation
B.	Denaturation
C.	Oxidation
D.	Reduction
Answer» C. Oxidation

Discussion

3.	Which of the following information is responsible to specify the three-dimensional shape of a protein?
A.	The protein’s peptide bond
B.	The protein’s amino acid sequence
C.	The protein’s interaction with other polypeptides
D.	The protein’s interaction with molecular chaperons
Answer» C. The protein’s interaction with other polypeptides

Discussion

4.	Which part of the amino acid gives it uniqueness?
A.	Amino group
B.	Carboxyl group
C.	Side chain
D.	None
Answer» D. None

Discussion

5.	Which of the following is not the classified form of conjugated proteins?
A.	Lipoproteins
B.	Glycoproteins
C.	Metalloproteins
D.	Complete proteins
Answer» E.

Discussion

6.	The average molecular weight of an amino acid residue in a protein is about
A.	128
B.	118
C.	110
D.	120
Answer» D. 120

Discussion

7.	Which of the following is a 39-residue hormone of the anterior pituitary gland?
A.	Corticotropin
B.	Glucagon
C.	Insulin
D.	Bradykinin
Answer» B. Glucagon

Discussion

8.	The factor which does not affect pKa value of an amino acid is
A.	The loss of charge in the α-carboxyl and α-amino groups
B.	The interactions with other peptide R groups
C.	Other environmental factors
D.	Molecular weight
Answer» E.

Discussion

9.	A tripeptide has
A.	3 amino acids and 1 peptide bond
B.	3 amino acids and 2 peptide bonds
C.	3 amino acids and 3 peptide bonds
D.	3 amino acids and 4 peptide bonds
Answer» C. 3 amino acids and 3 peptide bonds

Discussion

10.	Peptide bond is a
A.	Covalent bond
B.	Ionic bond
C.	Metallic bond
D.	Hydrogen bond
Answer» B. Ionic bond

Discussion

11.	Number of chiral centers in isoleucine is
A.	1
B.	2
C.	3
D.	4
Answer» C. 3

Discussion

12.	An amino acid that yields acetoacetyl CoA during the catabolism of its carbon skeleton will be considered
A.	Glycogenic
B.	Ketogenic
C.	Both glycogenic and ketogenic
D.	Essential
Answer» C. Both glycogenic and ketogenic

Discussion

13.	Which among the following is both glucogenic and ketogenic?
A.	Isoleucine
B.	Leucine
C.	Lysine
D.	Histidine
Answer» B. Leucine

Discussion

14.	Which of the following is an imino acid?
A.	Alanine
B.	Glycine
C.	Proline
D.	Serine
Answer» D. Serine

Discussion

15.	Which of the following is an essential amino acid?
A.	Cysteine
B.	Asparagine
C.	Glutamine
D.	Phenylalanine
Answer» E.

Discussion

16.	Which of the following is a true statement?
A.	Tryptophan and tyrosine are significantly more polar than phenylalanine
B.	Leucine is commonly used as an ingredient in the buffers of SDS page
C.	Aspartate is an essential amino acid
D.	Lysine is a non-essential amino acid
Answer» B. Leucine is commonly used as an ingredient in the buffers of SDS page

Discussion

17.	If pK1 = 2.34 and pK2 = 9.60, then the isoelectric point pI is
A.	5.87
B.	5.97
C.	3.67
D.	11.94
Answer» C. 3.67

Discussion

18.	The two amino acids having R groups with a negative net charge at pH 7.0 are
A.	Aspartate and glutamate
B.	Arginine and histidine
C.	Cysteine and methionine
D.	Proline and valine
Answer» B. Arginine and histidine

Discussion

19.	Identify the amino acids containing nonpolar, aliphatic R groups
A.	Phenylalanine, tyrosine, and tryptophan
B.	Glycine, alanine, leucine
C.	Lysine, arginine, histidine
D.	Serine, threonine, cysteine
Answer» C. Lysine, arginine, histidine

Discussion

20.	Identify the products formed in the following reaction CH3 COOCH3 + H2 O → A + B
A.	CH3 COOH and CH3 OH
B.	CH3 COOOH and CH4
C.	CO2 and C2 H6
D.	No reaction
Answer» B. CH3 COOOH and CH4

Discussion

21.	Which among the following statements is true about the following chemical reaction? 3Fe(s) + 4H2 O → Fe3 O4 (s) + 4H2
A.	Iron metal is getting reduced
B.	Water is acting as a reducing agent
C.	Water is acting as an oxidizing agent
D.	Water is getting oxidized
Answer» D. Water is getting oxidized

Discussion

22.	What trend does the reactivity of group II elements follow with water?
A.	Increases down the group
B.	Decreases down the group
C.	Does not follow any particular trend
D.	No reaction
Answer» B. Decreases down the group

Discussion

23.	Which of the following does not react with water?
A.	Barium
B.	Calcium
C.	Beryllium
D.	Strontium
Answer» D. Strontium

Discussion

24.	What does it mean when we say that water acts as a “heat buffer”?
A.	It keeps the temperature of an organism relatively constant as the temperature of the surroundings fluctuates.
B.	It increases the temperature of an organism as the temperature of the surroundings increases
C.	It decreases the temperature of an organism as the temperature of the surroundings increases
D.	It increases the temperature of an organism as the temperature of the surroundings decreases
Answer» B. It increases the temperature of an organism as the temperature of the surroundings increases

Discussion

25.	Hydrolysis reactions are catalyzed by enzymes called
A.	Oxidoreductase
B.	Ligase
C.	Hydrolase
D.	Isomerase
Answer» D. Isomerase

Discussion

26.	If pH of solution of NaOH is 12.0 the pH of H2 SO4 solution of same molarity will be
A.	2.0
B.	12.0
C.	1.7
D.	10.0387
Answer» D. 10.0387

Discussion

27.	Aqueous solution of the detergents are
A.	Neutral
B.	Acidic
C.	Basic
D.	Amphoteric
Answer» D. Amphoteric

Discussion

28.	If pKb for fluoride at 25°c is 10.83, the ionization constant of hydrofluoric acid in water at this temperature is
A.	3.52×10-3
B.	6.75×10-4
C.	5.38×10-2
D.	1.74×10-5
Answer» C. 5.38×10-2

Discussion

29.	K1 and K2 for oxalic acid are 6.5×10-2and 6.1×10-5respectively. What will be the [OH–] in a 0.01M solution of sodium oxalate?
A.	9.6×10-6
B.	1.4×10-1
C.	1.2×10-6
D.	1.3×10-8
Answer» D. 1.3×10-8

Discussion

30.	The degree of ionization does not depend on?
A.	Temperature
B.	Current
C.	Nature of solvent
D.	Concentration
Answer» C. Nature of solvent

Discussion

31.	Which of the following bases has the highest pKa value?
A.	NaOH
B.	NaNO3
C.	KNO3
D.	KCl
Answer» B. NaNO3

Discussion

32.	Which of the following acids has the lowest pKa value?
A.	Acetic acid
B.	Sulphuric acid
C.	Dil.HCl
D.	Oxalic acid
Answer» C. Dil.HCl

Discussion

33.	Identify the triprotic acid from the following
A.	Carbonic acid
B.	Bicarbonate
C.	Glycine
D.	Phosphoric acid
Answer» E.

Discussion

34.	Which of the following is an isotonic solution?
A.	0.9% sodium chloride
B.	0.45% sodium chloride
C.	Oceans
D.	10% dextrose in water
Answer» B. 0.45% sodium chloride

Discussion

35.	Which of the following is a hypotonic solution?
A.	10% dextrose in water
B.	0.45% sodium chloride
C.	5% dextrose in 0.9% sodium chloride
D.	Oceans
Answer» C. 5% dextrose in 0.9% sodium chloride

Discussion

36.	Which of the following is a hypertonic solution?
A.	Oceans
B.	Freshwater habitats
C.	0.45% sodium chloride
D.	Red blood cells placed in fresh water
Answer» B. Freshwater habitats

Discussion

37.	The bond dissociation energy of O-H bond in a water molecule is
A.	23 kJ/mole
B.	470 kJ/mole
C.	470 J/mole
D.	23 J/mole
Answer» C. 470 J/mole

Discussion

38.	The bond dissociation energy of hydrogen bonds in a water molecule is
A.	470 kJ/mole
B.	470 J/mole
C.	23 kJ/mole
D.	23 J/mole
Answer» D. 23 J/mole

Discussion

39.	Heat of vaporization of water is
A.	2260 J/g
B.	2260 kJ/g
C.	1260 J/g
D.	1260 kJ/g
Answer» B. 2260 kJ/g

Discussion

40.	What is the factor that is responsible for salts like NaCl to dissolve in water easily?
A.	Decrease in entropy
B.	Increase in entropy
C.	Increase in enthalpy
D.	Decrease in enthalpy
Answer» C. Increase in enthalpy

Discussion

41.	ΔH is positive for which of the following processes?
A.	Oxidation of nitrogen
B.	Melting of ice and evaporation of water
C.	Oxidation of gold
D.	Burning of chlorine
Answer» C. Oxidation of gold

Discussion

42.	ΔG is negative for which of the following processes?
A.	Melting of ice and evaporation of water
B.	Oxidation of nitrogen
C.	Oxidation of gold
D.	Burning of chlorine
Answer» B. Oxidation of nitrogen

Discussion

43.	What makes water a liquid at room temperature?
A.	Hydrogen bonds between water molecules
B.	Covalent bonding
C.	Noncovalent interactions
D.	Van der Waals forces of attraction
Answer» B. Covalent bonding

Discussion

Explore topic-wise MCQs in Maharashtra CET.

What&nbsp;are&nbsp;the&nbsp;following&nbsp;is&nbsp;not&nbsp;a&nbsp;factor&nbsp;responsible&nbsp;for&nbsp;denaturation&nbsp;of&nbsp;proteins?

Unfolding&nbsp;of&nbsp;a&nbsp;protein&nbsp;can&nbsp;be&nbsp;termed&nbsp;as

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;information&nbsp;is&nbsp;responsible&nbsp;to&nbsp;specify&nbsp;the&nbsp;three-dimensional&nbsp;shape&nbsp;of&nbsp;a&nbsp;protein?

&nbsp;Which&nbsp;part&nbsp;of&nbsp;the&nbsp;amino&nbsp;acid&nbsp;gives&nbsp;it&nbsp;uniqueness?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;not&nbsp;the&nbsp;classified&nbsp;form&nbsp;of&nbsp;conjugated&nbsp;proteins?

The&nbsp;average&nbsp;molecular&nbsp;weight&nbsp;of&nbsp;an&nbsp;amino&nbsp;acid&nbsp;residue&nbsp;in&nbsp;a&nbsp;protein&nbsp;is&nbsp;about

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;a&nbsp;39-residue&nbsp;hormone&nbsp;of&nbsp;the&nbsp;anterior&nbsp;pituitary&nbsp;gland?

The&nbsp;factor&nbsp;which&nbsp;does&nbsp;not&nbsp;affect&nbsp;pKa&nbsp;value&nbsp;of&nbsp;an&nbsp;amino&nbsp;acid&nbsp;is

A&nbsp;tripeptide&nbsp;has

Peptide&nbsp;bond&nbsp;is&nbsp;a

Number&nbsp;of&nbsp;chiral&nbsp;centers&nbsp;in&nbsp;isoleucine&nbsp;is

An&nbsp;amino&nbsp;acid&nbsp;that&nbsp;yields&nbsp;acetoacetyl&nbsp;CoA&nbsp;during&nbsp;the&nbsp;catabolism&nbsp;of&nbsp;its&nbsp;carbon&nbsp;skeleton&nbsp;will&nbsp;be&nbsp;considered

Which&nbsp;among&nbsp;the&nbsp;following&nbsp;is&nbsp;both&nbsp;glucogenic&nbsp;and&nbsp;ketogenic?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;an&nbsp;imino&nbsp;acid?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;an&nbsp;essential&nbsp;amino&nbsp;acid?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;a&nbsp;true&nbsp;statement?

&nbsp;If&nbsp;pK1&nbsp;=&nbsp;2.34&nbsp;and&nbsp;pK2&nbsp;=&nbsp;9.60,&nbsp;then&nbsp;the&nbsp;isoelectric&nbsp;point&nbsp;pI&nbsp;is

&nbsp;The&nbsp;two&nbsp;amino&nbsp;acids&nbsp;having&nbsp;R&nbsp;groups&nbsp;with&nbsp;a&nbsp;negative&nbsp;net&nbsp;charge&nbsp;at&nbsp;pH&nbsp;7.0&nbsp;are

&nbsp;Identify&nbsp;the&nbsp;amino&nbsp;acids&nbsp;containing&nbsp;nonpolar,&nbsp;aliphatic&nbsp;R&nbsp;groups

&nbsp;Identify&nbsp;the&nbsp;products&nbsp;formed&nbsp;in&nbsp;the&nbsp;following&nbsp;reaction CH3&nbsp;COOCH3&nbsp;+&nbsp;H2&nbsp;O&nbsp;&rarr;&nbsp;A&nbsp;+&nbsp;B

Which&nbsp;among&nbsp;the&nbsp;following&nbsp;statements&nbsp;is&nbsp;true&nbsp;about&nbsp;the&nbsp;following&nbsp;chemical&nbsp;reaction? 3Fe(s)&nbsp;+&nbsp;4H2&nbsp;O&nbsp;&rarr;&nbsp;Fe3&nbsp;O4&nbsp;(s)&nbsp;+&nbsp;4H2

What&nbsp;trend&nbsp;does&nbsp;the&nbsp;reactivity&nbsp;of&nbsp;group&nbsp;II&nbsp;elements&nbsp;follow&nbsp;with&nbsp;water?

&nbsp;Which&nbsp;of&nbsp;the&nbsp;following&nbsp;does&nbsp;not&nbsp;react&nbsp;with&nbsp;water?

What&nbsp;does&nbsp;it&nbsp;mean&nbsp;when&nbsp;we&nbsp;say&nbsp;that&nbsp;water&nbsp;acts&nbsp;as&nbsp;a&nbsp;&ldquo;heat&nbsp;buffer&rdquo;?

Hydrolysis&nbsp;reactions&nbsp;are&nbsp;catalyzed&nbsp;by&nbsp;enzymes&nbsp;called

If&nbsp;pH&nbsp;of&nbsp;solution&nbsp;of&nbsp;NaOH&nbsp;is&nbsp;12.0&nbsp;the&nbsp;pH&nbsp;of&nbsp;H2&nbsp;SO4&nbsp;solution&nbsp;of&nbsp;same&nbsp;molarity&nbsp;will&nbsp;be

&nbsp;Aqueous&nbsp;solution&nbsp;of&nbsp;the&nbsp;detergents&nbsp;are

&nbsp;If&nbsp;pKb&nbsp;for&nbsp;fluoride&nbsp;at&nbsp;25&deg;c&nbsp;is&nbsp;10.83,&nbsp;the&nbsp;ionization&nbsp;constant&nbsp;of&nbsp;hydrofluoric&nbsp;acid&nbsp;in&nbsp;water&nbsp;at&nbsp;this&nbsp;temperature&nbsp;is

&nbsp;K1&nbsp;and&nbsp;K2&nbsp;for&nbsp;oxalic&nbsp;acid&nbsp;are&nbsp;6.5&times;10-2and&nbsp;6.1&times;10-5respectively.&nbsp;What&nbsp;will&nbsp;be&nbsp;the&nbsp;[OH&ndash;]&nbsp;in&nbsp;a&nbsp;0.01M&nbsp;solution&nbsp;of&nbsp;sodium&nbsp;oxalate?

The&nbsp;degree&nbsp;of&nbsp;ionization&nbsp;does&nbsp;not&nbsp;depend&nbsp;on?

&nbsp;Which&nbsp;of&nbsp;the&nbsp;following&nbsp;bases&nbsp;has&nbsp;the&nbsp;highest&nbsp;pKa&nbsp;value?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;acids&nbsp;has&nbsp;the&nbsp;lowest&nbsp;pKa&nbsp;value?

Identify&nbsp;the&nbsp;triprotic&nbsp;acid&nbsp;from&nbsp;the&nbsp;following

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;an&nbsp;isotonic&nbsp;solution?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;a&nbsp;hypotonic&nbsp;solution?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;a&nbsp;hypertonic&nbsp;solution?

The&nbsp;bond&nbsp;dissociation&nbsp;energy&nbsp;of&nbsp;O-H&nbsp;bond&nbsp;in&nbsp;a&nbsp;water&nbsp;molecule&nbsp;is

The&nbsp;bond&nbsp;dissociation&nbsp;energy&nbsp;of&nbsp;hydrogen&nbsp;bonds&nbsp;in&nbsp;a&nbsp;water&nbsp;molecule&nbsp;is

Heat&nbsp;of&nbsp;vaporization&nbsp;of&nbsp;water&nbsp;is

What&nbsp;is&nbsp;the&nbsp;factor&nbsp;that&nbsp;is&nbsp;responsible&nbsp;for&nbsp;salts&nbsp;like&nbsp;NaCl&nbsp;to&nbsp;dissolve&nbsp;in&nbsp;water&nbsp;easily?

&Delta;H&nbsp;is&nbsp;positive&nbsp;for&nbsp;which&nbsp;of&nbsp;the&nbsp;following&nbsp;processes?

&Delta;G&nbsp;is&nbsp;negative&nbsp;for&nbsp;which&nbsp;of&nbsp;the&nbsp;following&nbsp;processes?

&nbsp;What&nbsp;makes&nbsp;water&nbsp;a&nbsp;liquid&nbsp;at&nbsp;room&nbsp;temperature?

What are the following is not a factor responsible for denaturation of proteins?

Unfolding of a protein can be termed as

Which of the following information is responsible to specify the three-dimensional shape of a protein?

Which part of the amino acid gives it uniqueness?

Which of the following is not the classified form of conjugated proteins?

The average molecular weight of an amino acid residue in a protein is about

Which of the following is a 39-residue hormone of the anterior pituitary gland?

The factor which does not affect pKa value of an amino acid is

A tripeptide has

Peptide bond is a

Number of chiral centers in isoleucine is

An amino acid that yields acetoacetyl CoA during the catabolism of its carbon skeleton will be considered

Which among the following is both glucogenic and ketogenic?

Which of the following is an imino acid?

Which of the following is an essential amino acid?

Which of the following is a true statement?

If pK1 = 2.34 and pK2 = 9.60, then the isoelectric point pI is

The two amino acids having R groups with a negative net charge at pH 7.0 are

Identify the amino acids containing nonpolar, aliphatic R groups

Identify the products formed in the following reaction CH3 COOCH3 + H2 O → A + B

Which among the following statements is true about the following chemical reaction? 3Fe(s) + 4H2 O → Fe3 O4 (s) + 4H2

What trend does the reactivity of group II elements follow with water?

Which of the following does not react with water?

What does it mean when we say that water acts as a “heat buffer”?

Hydrolysis reactions are catalyzed by enzymes called

If pH of solution of NaOH is 12.0 the pH of H2 SO4 solution of same molarity will be

Aqueous solution of the detergents are

If pKb for fluoride at 25°c is 10.83, the ionization constant of hydrofluoric acid in water at this temperature is

K1 and K2 for oxalic acid are 6.5×10-2and 6.1×10-5respectively. What will be the [OH–] in a 0.01M solution of sodium oxalate?

The degree of ionization does not depend on?

Which of the following bases has the highest pKa value?

Which of the following acids has the lowest pKa value?

Identify the triprotic acid from the following

Which of the following is an isotonic solution?

Which of the following is a hypotonic solution?

Which of the following is a hypertonic solution?

The bond dissociation energy of O-H bond in a water molecule is

The bond dissociation energy of hydrogen bonds in a water molecule is

Heat of vaporization of water is

What is the factor that is responsible for salts like NaCl to dissolve in water easily?

ΔH is positive for which of the following processes?

ΔG is negative for which of the following processes?

What makes water a liquid at room temperature?