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Test: Molecular Basis of Inheritance - 1


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25 Questions MCQ Test Biology Class 12 | Test: Molecular Basis of Inheritance - 1

Test: Molecular Basis of Inheritance - 1 for NEET 2022 is part of Biology Class 12 preparation. The Test: Molecular Basis of Inheritance - 1 questions and answers have been prepared according to the NEET exam syllabus.The Test: Molecular Basis of Inheritance - 1 MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Molecular Basis of Inheritance - 1 below.
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Test: Molecular Basis of Inheritance - 1 - Question 1

Genetic information is carried out by long chain molecule made up of

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 1

Genetic information is carried out by DNA and RNA. Both DNA and RNA are called genetic material, made up of long chain of nucleotide having-nitrogenous base, sugar and phosphate ions.

Test: Molecular Basis of Inheritance - 1 - Question 2

Name the conjugated protein used as genetic material in living cells?

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 2

Nucleoproteins are the chromosome made up of DNA, some RNA and histone proteins. They act as genetic material in living cells.

Test: Molecular Basis of Inheritance - 1 - Question 3

By which bonds the purine & pyrimidine pairs of Complementary Strands of DNA held together?

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 3

In complementary strands of DNA, purines and pyrimidine are held together by Hydrogen bond (H-bond). Adenine and Thymine have double hydrogen bond and cytosine and guanine are held by triple hydrogen bond.

Test: Molecular Basis of Inheritance - 1 - Question 4

There is no DNA in

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 4

In mature RBCs nucleus is absent and there is no DNA. Mature DNA do not divide to form new cells.

Test: Molecular Basis of Inheritance - 1 - Question 5

RNA polymerase is only capable of catalyzing the process of ______.

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 5

In the process of transcription RNA polymerase is only capable of elongation.
Initiation factor sigma helps in the process of initiation while termination factor Rho is helping in termination of the process.
So the correct option is 'Elongation'.

Test: Molecular Basis of Inheritance - 1 - Question 6

The strand of DNA that forms mRNA is called?

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 6

The DNA strand that serves as a template for mRNA synthesis is called as anticoding strand or antisense strand or noncoding strand. The other strand is called coding strand or sense strand as its base sequence is same as that of newly synthesized mRNA.

Test: Molecular Basis of Inheritance - 1 - Question 7

Codon is made up of

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 7

Codon is triplet means made up three nucleotides. Each codon codes for one amino acid to form proteins during protein synthesis.

Test: Molecular Basis of Inheritance - 1 - Question 8

The code AUG stands for

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 8

Code AUG code for Methionine. In all organism first amino acid coded is methionine by codon AUG.

Test: Molecular Basis of Inheritance - 1 - Question 9

Protein synthesis occurs over

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 9

Protein synthesis occurs over ribosomes which are also called protein factories of cell. Each ribosomes have two parts 40S and 60S in eukaryotes and 30S and 50S in prokaryotes.

Test: Molecular Basis of Inheritance - 1 - Question 10

Okazaki is known for his contribution to the understanding of

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 10

Okazaki contributed about the understanding of DNA replication in all living organism. He proposed the concept of semi-conservative nature of replication of DNA molecules.

Test: Molecular Basis of Inheritance - 1 - Question 11

What is called Griffith effect?

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 11

Griffith carried out experiment on mice using pneumonia causing bacteria to show that DNA is the genetic material by transforming non-virulent strain into virulent strain which is called bacterial transformation.

Test: Molecular Basis of Inheritance - 1 - Question 12

Enzymes called ______ add complementary nucleotides, floating inside the nucleus.

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 12

Enzymes DNA polymerase adds complementary nucleotides. This enzyme is present floating inside the nucleus.

Test: Molecular Basis of Inheritance - 1 - Question 13

Repressor proteins are coded for by ______ genes.

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 13

Regulator genes codes for repressor proteins during translation of DNA into protein via mRNA.

Test: Molecular Basis of Inheritance - 1 - Question 14

RNA polymerase is only capable of catalyzing the process of

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 14

In the process of transcription RNA polymerase is only capable of elongation.

Initiation factor sigma helps in the process of initiation while termination factor Rho is helping in termination of the process.

So the correct option is 'Elongation'.

Test: Molecular Basis of Inheritance - 1 - Question 15

Signaling between cells usually results in the activation of protein_______.

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 15

Signaling between cells for transcription of m-RNA from DNA is controlled by an activation of protein kinases. It is present in cytoplasm of cells.

Test: Molecular Basis of Inheritance - 1 - Question 16

What is the purpose of the Human Genome Project?

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 16

The main purpose of human genome project launched in 1990 was to identify the sequence of human DNA.

Test: Molecular Basis of Inheritance - 1 - Question 17

Human genome project was closely associated with the rapid development of a new area in biology called as

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 17

Human genome project was associated with the rapid development of new area of biology called as bioinformatics. This branch of biological science is used to known the sequence of gene on Chromosome of living organisms.

Test: Molecular Basis of Inheritance - 1 - Question 18

The human genome contains ------------- nucleotide bases.

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 18

Human genome contains 3164.7 million nucleotide bases.

Test: Molecular Basis of Inheritance - 1 - Question 19

Gel electrophoresis is used for

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 19

Gel electrophoresis technique is used for separation of DNA fragments according to their size. This is an important tool to study the genome of an individual. 

Test: Molecular Basis of Inheritance - 1 - Question 20

Which chromosome of human genome contains least number of genes?

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 20

There are 23 pairs of chromosome in human cells. The chromosome Y is the smallest and contain least number of gene (231) and chromosome 1 contain highest number of gene (2968).

Test: Molecular Basis of Inheritance - 1 - Question 21

Satellite DNA is useful tool in

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 21

Satellite DNA is useful tool in forensic science as the density of DNA differs in from each other. It is used to identify the individuals form the other.

Test: Molecular Basis of Inheritance - 1 - Question 22

State the use of molecular medicine?

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 22

Molecular medicine improves diagnosis of diseases, gene therapy and understanding several diseases like Alzheimer’s Parkinsons diseases etc.

Test: Molecular Basis of Inheritance - 1 - Question 23

For DNA finger printing, the DNA is obtained from

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 23

The DNA required for finger printing can be obtained from WBCs, root hair cells and body secretion as all the cells contain same type of genetic makeup.

Test: Molecular Basis of Inheritance - 1 - Question 24

During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is its DNA-binding sequence?

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 24

During transcription, RNA polymerase enzyme binds to a gene promoter and assumes a saddle–like structure in which DNA-binding sequence is TATA.

Test: Molecular Basis of Inheritance - 1 - Question 25

DNA is made of two chains that twist about one another in the shape of a _______.

Detailed Solution for Test: Molecular Basis of Inheritance - 1 - Question 25

The double helix describes the appearance of double-stranded DNA, which is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together. Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain. 

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