Nucleic acids and Enzymes

PPSC Lecturer Biology Test 45 Online Preparation MCQs

Lecturer Biology MCQs / Biology MCQs, Biomolecules, Cell cycle and Cell divisions, FPSC Lecturer Biology mcqs, Nucleic acids and Enzymes, ppsc Biology MCQs, Ppsc lecturer Biology, ppsc past papers of Biology, Proteins

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Test Instructions:-
Test Name	Lecturer Biology
Subject	Biology Test 45
Test Type	MCQs
Total Questions	25
Total Time	20 Minutes
Total Marks	100

You have 20 minutes to pass to the quiz.

PPSC LECTURER OF BIOLOGY TEST NO. 45

1 / 25

What is called that join the phosphate to one substrate to another substrate ?

Synthetase

Isomerases

Hydrolysis

Transferase

2 / 25

Find out the incorrect pair:

m-RNA - genetic codon

DNA - Place for the protein synthesis

r - RNA - Ribosome structure

t - RNA - anticodon

3 / 25

Which pair is correct of minerals for the activation of enolase ?

Mg, Ca, V

Cu, Zn, Mo

Mg, Mn, Zn

Mg, Zn, B

4 / 25

Full form of FMN :

Flavin mononucleotide

Flavin mononucleic acid

Ferredoxin mononitrite

Ferredoxin mononucleic acid

5 / 25

What is cofactor?

Apoenzyme

Inorganic substances

All of these

Non protein part of the enzyme structure

6 / 25

Find out incorrect pair :

Aldolase - lyases

Acetyle co-A enzyme synthetase-ligases

Maltase - hydrolases

Haxokinase - isomerases

7 / 25

Pyrenoids are made up of

Central Nucleic acid surrounded by protein layer

Central protein and starch layer

Lateral protein and surrounded by lipid layer

Central starch and surrounded by protein layer

8 / 25

What is dehydrogenation?

Duplication of hydrogen

Donation of a hydrogen

Joining of hydrogen

Absence of hydrogen

9 / 25

Under which physiological factor living organisms perform their activity ?

At high temperature and atmospheric pressure

At low temperature and atmosphere pressure

At low temperature and high atmospheic pressure

At high temperature and low atmospheric pressure

10 / 25

Enzyme means

Biological catalyst

Biological chemical

Biological protein

Biological hormone

11 / 25

Nucleoprotein means:

nucleotide + protein

t - RNA + protein

r - RNA + protein

r - RNA + nucleic acid

12 / 25

What enzymes do ?

B & D

Increase in the rate of reaction

Decrease in the energy level of reaction

Increase in the energy level of reaction

Decrease in the rate of reaction

13 / 25

By which bond two individual Ribonucleotide units are bind together ?

Phospho di-ester bond

Co-valent bond

Peptide bond

Hydrogen bond

14 / 25

Which structure is responsible for the active site of an enzyme ?

Its colloidal form

Its amphoteric property

Its three dimensional structure

Activation energy level of a reaction

15 / 25

Find out the correct pair of the following.

NADP - Co-enzyme

Prosthetic group - protein part of enzyme

Apoenzyme - none protein part of enzyme

Ribozyme - Ribosome + r-RNA

16 / 25

Ribosomes provides the place for which reaction ?

Protein synthesis

DNA synthesis

m-RNA synthesis

Respiration

17 / 25

Which group is correct for the reaction takes place on enzyme at higher and lower temperature sequentially ?

Inactive and denaturation

Denaturation and inactive

Inactive and damage

Degerate and Inactive

18 / 25

Which type of enzyme Hexokinase is ?

Ligases

Lyases

Transferases

Isomerases

19 / 25

Full form of NAD:

Nicotinamide di-nucleotide

Nicotinamide Adenine di-nucleotide

Nitric acid di-nucleotide

Nucleic acid di-nucleotide

20 / 25

Succinic dehydrogenase is example of which type of enzyme ?

Transferases

Oxido-reductases

Lyases

Hydrolysis

21 / 25

What is Ribozyme?

Enzymes made up of nucleic acid

Ribosome + r - RNA

r - RNA + protein

r - RNA

22 / 25

Zn is require for the activation of:

Nitrogenase

Hydrogenase

Glucose phosphatase

Carbonic Anhydrase

23 / 25

Form where Ligase enzyme gets energy in use ?

From the pyrophosphate bond of GTP

From the pyrophosphate bond of AMP

From the pyrophosphate bond of GDP

From the pyrophosphate bond of ATP

24 / 25

What is essential for performing every biochemical reaction ?

Three dimensional form

All of the given

Activation energy level

Active site

25 / 25

Apoenzyme group is made up of what?

Protein

Nucleic acid

Carbohydrate

Lipid

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