Chapter 15- BIODIVERSITY AND ITS CONSERVATION (Part- 1 )
1. Which of the following is not a characteristic feature of the genetic code?
- Non-overlapping
- Universal
- Ambiguous
- Degeneracy
- 3 Clear All
2. The triplet codon AUG in the genetic code specifies the amino acid:
- Methionine
- Valine
- Tryptophan
- Leucine
- 1 Clear All
3. Which of the following is responsible for the initiation of translation in protein synthesis?
- tRNA
- mRNA
- rRNA
- Start codon
- 4 Clear All
4. What is the role of the ribosome in translation?
- It carries amino acids to the ribosome.
- It forms a peptide bond between amino acids.
- It binds to the mRNA and moves along it.
- It releases the synthesized protein from the ribosome.
- 3 Clear All
5. Which of the following is responsible for bringing amino acids to the ribosome during translation?
- tRNA
- mRNA
- rRNA
- DNA
- 1 Clear All
6. The process of translation occurs in the:
- Nucleus
- Cytoplasm
- Mitochondria
- Golgi apparatus
- 2 Clear All
7. Which of the following is a stop codon in the genetic code?
- AUG
- UAA
- GUA
- AAA
- 2 Clear All
8. During translation, the codon on mRNA pairs with the anticodon on:
- mRNA
- tRNA
- rRNA
- snRNA
- 2 Clear All
9. The process of translation is catalyzed by:
- Ribosomes
- Enzymes
- Nucleic acids
- Hormones
- 1 Clear All
10. Which of the following is involved in post-translational modifications of proteins?
- Ribosomes
- Enzymes
- Nucleic acids
- Golgi Apparatus
- 4 Clear All
1. Frameshift mutations occur due to:
- Deletion or insertion of nucleotides.
- Point mutations
- Silent mutations
- Missense mutations
- 1 Clear All
12. Which of the following is an example of a silent mutation?
- Substitution of one nucleotide for another.
- Insertion of an extra nucleotide.
- Deletion of a nucleotide.
- Mutation in a non-coding region of DNA.
- 4 Clear All
13. Which of the following is a transversion mutation?
- A-T to G-C substitution.
- A-T to A-T substitution.
- A-T to T-A substitution.
- G-C to C-G substitution.
- 1 Clear All
14. Which of the following is a mutagenic agent?
- UV radiation
- Water
- Oxygen
- CO2
- 1 Clear All
15. The genetic disorder caused by the deletion of a single nucleotide in the β-globin gene is:
- Cystic fibrosis
- Duchenne muscular dystrophy
- Sickle cell anemia
- Hemophilia
- 3 Clear All
16. The process of DNA replication is:
- Semi-conservative
- Conservative
- Dispersive
- Repetitive
- 1 Clear All
17. The enzyme responsible for unwinding the DNA double helix during replication is
- DNA helicase
- DNA polymerase
- DNA ligase
- DNA topoisomerase
- 1 Clear All
18. The leading and lagging strands in DNA replication differ in terms of:
- Synthesis speed
- Direction of synthesis
- Number of Okazaki fragments
- Types of nucleotides used
- 2 Clear All
19. Which of the following is not involved in DNA repair mechanisms?
- Mismatch repair
- Nucleotide excision repair
- Base excision repair
- DNA transcription
- 4 Clear All
20. Telomeres are repetitive sequences present at the:
- Start codon of genes
- End of chromosomes
- Promoter region of genes
- Intron regions of genes
- 4 Clear All