Nucleic acids and Enzymes

PPSC Lecturer Biology Test 46 Online Preparation MCQs

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Test Instructions:-
Test Name	Lecturer Biology
Subject	Biology Test 46
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. 46

1 / 25

In the DNA, Nucleotides are joined by:

Van-der-vals

Hydrogen bond

Electro-valent bond

Co-valent bond

2 / 25

During protein synthesis, in a cytoplasm ribosome gets a appropriate amino acids from the flow of it, which RNA is further get there amino acid ?

r - RNA

m - RNA

t - RNA

DNA

3 / 25

In the structure of DNA:

Total purine Nucleotide and Pyrimidine Necleotide are not same.

Both are in the direction of 5' ® 3'

Now the chain is Anti parallel where one strand is 3' ® 5' and another is 3' ® 5'

Proportion of Adenine is different then thymin in different organisms

4 / 25

In 1980's RNA term were used as a result of evolution on the basis of

Genetic material is RNA in the viruses

All the cells does not having RNA

Because of the enzymatic property of RNA

Because of the importance of m-RNA, t-RNA, r-RNA in the protein synthesis

5 / 25

Which sentences is right from the following ?

In general only 20 enzymes are found

In general only 80 types of chromosomes are found

In general four types of DNA molecules are found

In general there are so many proteins

6 / 25

In a human cells, when a new DNA synthesis take place, the surrounding medium is filled with the Radioactive thymine. Now which type of the following chromatid will become radioactive when comes in contact with thymine in the S-phase ?

A and B both

Euchrometin

Hetrochromatin

Non of these

7 / 25

With the structure of clover leaf which RNA is incorporated ?

r-RNA

t-RNA

m-RNA

hn-RNA

8 / 25

Which is the inhibitor of succinate dehydrogenase ?

Melonate

Malate

Succinate

Oxaloacetate

9 / 25

What is the length of one complete spiral of b - DNA ?

0.34 nm

0.034 nm

34 nm

3.4 nm

10 / 25

Which Radioactive is required for the measuring of DNA synthesis ?

Adenine

Uracil

De-oxy ribose

Thymine

11 / 25

Physically and chemically in both the ways which biomolecule is majority differentiated in the cell ?

Protein

Lipid

Nucleic Acid

Carbohydrate

12 / 25

Which is the most abundant organic substance on the earth ?

protein

steroid

lipid

cellulose

13 / 25

Mutations takes place at the gene positions by:

Reverse Mutation

Forward Mutation

Chromosomal Mutation

Point Mutation

14 / 25

A small fragment of DNA consisting 120 Adenine and 120 Cytosine base so the total base pairs are present in this fragment is:

240

480

120

15 / 25

Amino Acids structure forms

Protein

Fatty Acid

a - Keto Acid

Essential Oil

16 / 25

What does it called an enzymes which have the different molecule structures but the same functions ?

Holoenzyme

Isoenzyme

Co-enzyme

Apoenzyme

17 / 25

What is collagen ?

Carbohydrate

Fibrous protein

Lipid

Globular protein

18 / 25

Which units are repeated in the structure of DNA ?

Ribonucleoside

De-oxy ribonucleoside

De-oxy ribonucleotide

Ribonucleotide

19 / 25

Which Amino Acid is very common ?

Alanine

Glycine

Tyrosine

Aspergine

20 / 25

By which the gene is arranged in the bacterial chromosome ?

Basic protein

Acidic protein

Actin

Histones

21 / 25

How it appears in the 3D structure of transfer - RNA ?

Y - shape

E - shape

L - shape

S - shape

22 / 25

Collagen is full of

Serine

Aspartic Acid

Glutamic Acid

Glycine

23 / 25

Enzymes are mainly

Structural protein

Nucleo protein

Fibrous protein

Globular protein

24 / 25

In the Nucleus, how many types of RNA polymerase is required for the synthesis of RNA ?

25 / 25

Enzymatic reaction is inhibited by

Enzyme

Increase in temperature

Substrate

Final product

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