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Science (English Medium) कक्षा १२ - CBSE Important Questions for Biology

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What do 'Y' and 'B' stand for in 'YAC' and 'BAC' used in Human Genome Project (HGP).

Mention their role in the project.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Human Genome Project

Describe the process of transcription in bacteria

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription

How do m-RNA, t-RNA and ribosomes help in the process of translation?

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription

Explain the process of transcription in prokaryotes.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription

Name the enzyme and state its property that is responsible for continuous and discontinuous replication of the two strands of a DNA molecule

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Deoxyribonucleic Acid (DNA)

It is established that RNA is the first genetic material. Explain giving three reasons.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Properties of Genetic Material

Name the enzyme responsible for the transcription of tRNA and the amino acid the initiator tRNA gets linked with.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription

State the aim and describe Messelson and Stahl’s experiment.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription

How are the following formed and involved in DNA packaging in a nucleus of a cell?

(i) Histone octomer
(ii) Nucleosome
(iii) Chromatin
Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Packaging of DNA Helix

Differentiate between Euchromatin and Heterochromatin.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Packaging of DNA Helix

List the criteria a molecule that can act as genetic material must fulfill. Which one of the criteria are best fulfilled by DNA or by RNA thus making one of them a better genetic material than the other? Explain.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Properties of Genetic Material

Give an example of a codon having dual function.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Genetic Code

State the difference between the structural genes in a Transcription Unit of Prokaryotes and Eukaryotes.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription Unit and the Gene

List two essential roles of ribosomes during translation.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Translation

How is Prokaryotic Transcription process different in eukaryotes?

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription

Explain the processing the hnRNA needs to undergo before becoming functional mRNA eukaryotes.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription

Explain the role of initiator tRNA in the initiation of protein synthesis.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Protein Synthesis >> Transcription

Write the percentage of the total human genome that codes for proteins and the percentage of discovered genes whose functions are known as observed during HGP.

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Human Genome Project

Expand 'SNPs' identified by scientists in HGP

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Human Genome Project

How does a degenerate code differ from an unambiguous one?

Appears in 1 question paper
Chapter: [5] Molecular Basis of Inheritance
Concept: Genetic Code >> tRNA – the Adapter Molecule
< prev  321 to 340 of 571  next > 
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CBSE Science (English Medium) कक्षा १२ Important Questions
Important Questions for CBSE Science (English Medium) कक्षा १२ Biology
Important Questions for CBSE Science (English Medium) कक्षा १२ Chemistry
Important Questions for CBSE Science (English Medium) कक्षा १२ Computer Science (C++)
Important Questions for CBSE Science (English Medium) कक्षा १२ Computer Science (Python)
Important Questions for CBSE Science (English Medium) कक्षा १२ English Core
Important Questions for CBSE Science (English Medium) कक्षा १२ English Elective - NCERT
Important Questions for CBSE Science (English Medium) कक्षा १२ Entrepreneurship
Important Questions for CBSE Science (English Medium) कक्षा १२ Geography
Important Questions for CBSE Science (English Medium) कक्षा १२ Hindi (Core)
Important Questions for CBSE Science (English Medium) कक्षा १२ Hindi (Elective)
Important Questions for CBSE Science (English Medium) कक्षा १२ History
Important Questions for CBSE Science (English Medium) कक्षा १२ Informatics Practices
Important Questions for CBSE Science (English Medium) कक्षा १२ Mathematics
Important Questions for CBSE Science (English Medium) कक्षा १२ Physical Education
Important Questions for CBSE Science (English Medium) कक्षा १२ Physics
Important Questions for CBSE Science (English Medium) कक्षा १२ Political Science
Important Questions for CBSE Science (English Medium) कक्षा १२ Psychology
Important Questions for CBSE Science (English Medium) कक्षा १२ Sociology
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