CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet Set B

Download printable Biology Class 12 Worksheets in pdf format, CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet Set B has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Biology Class 12 Assignments and practice them daily to get better marks in tests and exams for Grade 12. Free chapter wise worksheets with answers have been designed by Standard 12 teachers as per latest examination pattern

Molecular Basis of Inheritance
 
1. The DNA site where DNA-dependent RNA- polymerase binds for transcription, is called
(a) operator
(b) promotor
(c) regulator
(d) receptor
 
2. Operon model for regulation of transcription was proposed by
(а) Meselson and Stahl
(b) Jacob and Monod
(c) Watson and Crick
(d) Hershey and Chase
 
3. Eukaryotic RNA polymerase III catalyses the synthesis of
(a) mRNA
(b) rRNA
(c) hnRNA
(d) tRNA
 
4. The sequence of nitrogen bases in a # segment of a coding strand of DNA is ’ AATGCTTAGGCA. What will be the sequence of nitrogen bases in the wRNA transcribed by it?
(a) UUA CGA AUC CGU
(b) AAU GCU AAC CGA
(c) AAU GCA AUC CGU
(d) AAU GCU UAG GCA
 
5. In the lac operon of E.coli, the i gene codes for
(a) inducer
(b) repressor
(c) lactase
(d) β-galactosidase
 
6. Which of the following sets of codons contains only termination codons?
(a) UAA, UGA, UAG
(b) UAA, UUU, UGG
(c) UAA, UAG, UAC
(d) UUU, UCC, UGG
 
7. The central dogma of molecular biology (genetic information flow) was modified by the discovery of
(a) RNA polymerase
(b) DNA ligase
(c) Reverse transcriptase
(d) DNA polymerase
 
8. The fact that a purine base always paired through hydrogen bonds with a pyrimidine base leads to, in the DNA double helix [NCERT Exemplar]
(a) the antiparallel nature
(b) the semiconservative nature
(c) uniform width throughout DNA
(d) uniform length in all DNA.
 
9. The promoter site and the terminator site for transcription are located at [NCERT Exemplar]
(a) 3′ (downstream) end and 5′ (upstream) end, respectively of the transcription unit.
(b) 5′ (upstream) end and 3′ (downstream) end, respectively of the transcription unit.
(c) the 5′ (upstream) end.
(d) the 3′ (downstream) end.
 
10. The human chromosome with the highest and least number of genes in them are respectively [NCERT Exemplar]
(a) Chromosome 21 and Y
(b) Chromosome 1 and X
(c) Chromosome 1 and Y
(d) Chromosome X and Y
 
11. Discontinuous synthesis of DNA occurs in one strand, because [NCERT Exemplar]
(a) DNA molecule being synthesised is very long.
(b) DNA dependent DNA polymearse catalyses polymerisation only in one direction (5′→ 3′).
(c) it is a more efficient process.
(d) DNA ligase has to have a role.
 
12. Which of the following are the functions of RNA? [NCERT Exemplar]
(a) It is a carrier of genetic information from DNA to ribosomes synthesising polypeptides.
(b) It carries amino acids to ribosomes
(c) It is a constituent component of ribosomes
(d) All of the above.
 
13. In E.coli, the lac operon gets switched on when [NCERT Exemplar]
(a) lactose is present and it binds to the », repressor.
(b) repressor binds to operator.
(c) RNA polymerase binds to the operator.
(d) lactose is present and it binds to RNA polymerase.
 
14. The net electric charge on DNA and histone, is
(a) positive, negative
(b) negative, positive
(c) negative, negative
(d) positive, positive.
 
15. If the sequence of the nitrogen bases in the coding strand of DNA is 5’- ATGAATT-3’, the sequence of bases in the RNA transcribed by it will be ______ .
 
16. _____ step in transcription is catalysed by the enzyme DNA-dependent RNA polymerase.
 
17. Lac operon shows the control of gene expression at the _____ level, in E.coli.
 
18. The enzyme DNA polymerase catalyses the polymerisation of nucleotides in the ______ direction, for the lagging strand.
 
19. The last chromosome to be completely sequenced in the Human Genome Project (HGP) is ______ .
 
20. RNA polymerase II in eukaryotes catalyses the transcription of ______ .
 
21. The presence of ______ group in every ribonucleotide makes RNA labile and reactive.
 
22. Meselson and Stahl experimentally proved the _____ replication of DNA.
 
23. During splicing in eukaryotes, the _____ are joined to from the RNA.
 
24. _____ factor functions as the initiation factor in the transcription of prokaryotes.


Please click on below link to download CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet Set B

 


Click to View or Download pdf file
Click for more Biology Study Material
CBSE Class 12 Biology All Chapters Question Bank
CBSE Class 12 Biology Bio Technology Principles And Processes Question Bank
CBSE Class 12 Biology Biodiversity And Conservation Question Bank
CBSE Class 12 Biology Biodiversity And Conservation Worksheet Set A
CBSE Class 12 Biology Biodiversity and Conservation Worksheet Set A
CBSE Class 12 Biology Biodiversity And Conservation Worksheet Set B
CBSE Class 12 Biology Biodiversity And Conservation Worksheet Set C
CBSE Class 12 Biology Biodiversity And Conservation Worksheet Set D
CBSE Class 12 Biology Biotechnology And Its Application Question Bank
CBSE Class 12 Biology Biotechnology and Its Applications Worksheet Set A
CBSE Class 12 Biology Biotechnology Principles and Processes Worksheet Set A
CBSE Class 12 Biology Ecosystem Question Bank
CBSE Class 12 Biology Ecosystem Worksheet
CBSE Class 12 Biology Ecosystem Worksheet Set A
CBSE Class 12 Biology Environmental Issues Question Bank
CBSE Class 12 Biology Environmental Issues Worksheet
CBSE Class 12 Biology Environmental Issues Worksheet Set A
CBSE Class 12 Biology Evolution Question Bank
CBSE Class 12 Biology Evolution Worksheet Set A
CBSE Class 12 Biology Evolution Worksheet Set A
CBSE Class 12 Biology Human Health and Disease Worksheet Set A
CBSE Class 12 Biology Human Health and Disease Worksheet Set B
CBSE Class 12 Biology Human Health And Diseases Question Bank
CBSE Class 12 Biology Human Health And Diseases Worksheet Set A
CBSE Class 12 Biology Human Health And Diseases Worksheet Set B
CBSE Class 12 Biology Human Reproduction Question Bank
CBSE Class 12 Biology Human Reproduction Worksheet
CBSE Class 12 Biology Human Reproduction Worksheet Set A
CBSE Class 12 Biology Human Reproduction Worksheet Set A
CBSE Class 12 Biology Human Reproduction Worksheet Set B
CBSE Class 12 Biology Human Reproduction Worksheet Set C
CBSE Class 12 Biology Human Reproduction Worksheet Set D
CBSE Class 12 Biology Human Reproduction Worksheet Set E
CBSE Class 12 Biology Human Reproduction Worksheet Set F
CBSE Class 12 Biology Human Reproductive Health Question Bank
CBSE Class 12 Biology Materials Organisms And Population Worksheet
CBSE Class 12 Biology Microbes in Human Welfare Worksheet Set A
CBSE Class 12 Biology Microbes In Human Welfare Worksheet Set A
CBSE Class 12 Biology Microbes In Human Welfare Worksheet Set B
CBSE Class 12 Biology Microbes In Human Welfare Worksheet Set C
CBSE Class 12 Biology Molecular Basis of Inheritance Question Bank
CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet
CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet Set A
CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet Set A
CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet Set B
CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet Set B
CBSE Class 12 Biology Molecular Basis of Inheritance Worksheet Set C
CBSE Class 12 Biology Organisms And Population Worksheet Set A
CBSE Class 12 Biology Organisms And Population Worksheet Set B
CBSE Class 12 Biology Organisms And Populations Question Bank
CBSE Class 12 Biology Organisms and Populations Worksheet Set A
CBSE Class 12 Biology Principles And Processes of Biotechnology Worksheet
CBSE Class 12 Biology Principles of Inheritance And Variation Question Bank
CBSE Class 12 Biology Principles of Inheritance And Variation Worksheet Set A
CBSE Class 12 Biology Principles of Inheritance and Variation Worksheet Set A
CBSE Class 12 Biology Principles of Inheritance And Variation Worksheet Set B
CBSE Class 12 Biology Principles of Inheritance and Variation Worksheet Set B
CBSE Class 12 Biology Principles of Inheritance And Variation Worksheet Set C
CBSE Class 12 Biology Reproduction In Organisms Question Bank
CBSE Class 12 Biology Reproduction In Organisms Worksheet
CBSE Class 12 Biology Reproduction In Organisms Worksheet Set A
CBSE Class 12 Biology Reproduction in Organisms Worksheet Set A
CBSE Class 12 Biology Reproduction In Organisms Worksheet Set B
CBSE Class 12 Biology Reproduction In Organisms Worksheet Set B
CBSE Class 12 Biology Reproduction In Organisms Worksheet Set B
CBSE Class 12 Biology Reproduction In Organisms Worksheet Set C
CBSE Class 12 Biology Reproductive Health Worksheet
CBSE Class 12 Biology Reproductive Health Worksheet Set A
CBSE Class 12 Biology Reproductive Health Worksheet Set A
CBSE Class 12 Biology Reproductive Health Worksheet Set B
CBSE Class 12 Biology Reproductive Health Worksheet Set C
CBSE Class 12 Biology Reproductive Health Worksheet Set C
CBSE Class 12 Biology Reproductive Health Worksheet Set D
CBSE Class 12 Biology Reproductive Health Worksheet Set E
CBSE Class 12 Biology Reproductive In Human Beings Worksheet
CBSE Class 12 Biology Sexual Principles of Inheritance And Variation Worksheet
CBSE Class 12 Biology Sexual Reproduction in Flowering Plants Worksheet Set A
CBSE Class 12 Biology Sexual Reproduction In Flowering Plants Worksheet Set A Solved
CBSE Class 12 Biology Sexual Reproduction In Flowering Plants Worksheet Set B
CBSE Class 12 Biology Sexual Reproduction In Flowering Plants Worksheet Set C
CBSE Class 12 Biology Sexual Reproduction In Flowering Plants Worksheet Set D
CBSE Class 12 Biology Sexual Reproduction In Flowering Plants Worksheet Set E
CBSE Class 12 Biology Sexual Reproduction In Flowering Plants Worksheet Set F
CBSE Class 12 Biology Sexual Reproduction In Human Beings Worksheet
CBSE Class 12 Biology Stategies for Enchancement in Food Production Worksheet Set A
CBSE Class 12 Biology Strategies For Enhancement In Food Production
CBSE Class 12 Biology Strategies For Enhancement In Food Production Worksheet
CBSE Class 12 Biology Worksheet Set A Solved
CBSE Class 12 Biology Worksheet Set B Solved
CBSE Class 12 Biology Worksheet Set C Solved
CBSE Class 12 Biology Worksheet Set D Solved
CBSE Class 12 Biology Worksheet Set E Solved
CBSE Class 12 Biology Worksheet Set F Solved
CBSE Class 12 Biology Worksheet Set G Solved
CBSE Class 12 Biology Worksheet Set H Solved
CBSE Class 12 Biology Worksheet Set I Solved

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Moderation of Marks Class 11 and 12 Board Exams

The portal for moderation and finalization of results for Class-12 is being opened from 16.07.2021 to 22.07.2021. As Board has to declare the result latest by 31.07.2021, schools have been requested to follow the schedule strictly and complete the moderation within...

CBSE asks schools to load Class 12 Internal Assessment Marks

This has a reference to the letter no CBSE/COORD/2021 dated 11.02.2021 regarding conduct of the School-Based Assessment (Internal Assessment/Practical/ Project) of Class-XII and uploading the marks by 11.06.2021. It has been observed that some schools have not been...

CBSE Board Examination Scheme of Assessment 2021 2022

A. Academic session to be divided into 2 Terms with approximately 50% syllabus in each term: The syllabus for the Academic session 2021-22 will be divided into 2 terms by following a systematic approach by looking into the interconnectivity of concepts and topics by...

CBSE Class 12 Evaluation Criteria 2021

SUMMARY OF THE POLICY FOR TABULATION OF MARKS FOR CLASS XII BOARD EXAMINATIONS 2021   1(a) Due to cancellation of the Board examinations, the assessment of theory portion of 80/70/60/50/30 marks will be done by the school based on the following:     Class...

FAQs on Policy for Tabulation of Marks for Class 10 Board Exams

ON POLICY Question.1 How CBSE will declare the result of Class-X? Answer. Results of Class X Board will be declared on the basis of an objective criterion developed by the Board vide Notification no.CBSE/CE/2021 dated 01.05.2021. Question.2. If any candidate is not...

×
Studies Today