Chapter 14- ECOSYSTEM (Part- 1 )
1. Which of the following is NOT a characteristic of genetic code?
- Universality
- Non-overlapping
- Ambiguity
- Degeneracy
- 3 Clear All
2. The process of translation occurs in the:
- Nucleus
- Ribosome
- Endoplasmic Reticulum
- Golgi Apparatus
- 2 Clear All
3. The enzyme responsible for the synthesis of mRNA during transcription is:
- RNA polymerase I
- RNA polymerase II
- RNA polymerase III
- DNA polymerase
- 2 Clear All
4. In eukaryotes, introns are:
- Expressed genes
- Non-coding sequences
- Regulatory elements
- Repetitive DNA sequences
- 2 Clear All
5. In prokaryotes, transcription and translation occur:
- Simultaneously
- In the nucleus
- In the cytoplasm
- In the Golgi apparatus
- 1 Clear All
6. Which of the following statements is true regarding the lac operon in bacteria?
- It is an inducible operon.
- It is a repressible operon.
- It is regulated by a repressor protein.
- It is regulated by an activator protein.
- 1 Clear All
7. A frameshift mutation results from the:
- Insertion or deletion of a nucleotide
- Substitution of one nucleotide for another
- Inversion of a chromosome segment
- Duplication of a chromosome segment
- 1 Clear All
8. Which of the following techniques is used to amplify DNA sequences?
- Polymerase chain reaction (PCR).
- Gel electrophoresis
- Southern blotting
- DNA sequencing
- 1 Clear All
9. The RNA molecules that remove introns and splice exons together are called:
- mRNA
- tRNA
- rRNA
- snRNA
- 4 Clear All
10. The enzyme responsible for joining Okazaki fragments during DNA replication is:
- RNA polymerase I
- RNA polymerase II
- DNA polymerase III
- DNA ligase
- 4 Clear All
11. Which of the following is an example of post-translational modification?
- Alternative splicing
- Methylation
- Phosphorylation
- Transcription
- 3 Clear All
12. Which of the following is NOT involved in gene regulation?
- Promoters
- Enhancers
- Repressors
- Ligases
- 4 Clear All
13. The phenomenon of RNA interference (RNAi) is associated with:
- Transcription
- Translation
- DNA replication
- Post-translational modifications
- 2 Clear All
14. The genetic disorder caused by the presence of an extra copy of chromosome 21 is called:
- Turner syndrome
- Down syndrome
- Cri du chat syndrome
- Klinefelter syndrome
- 2 Clear All
15. The enzyme responsible for DNA replication is
- DNA polymerase
- RNA polymerase.
- Reverse transcriptase
- Ligase
- 1 Clear All
16. The process of DNA replication is:
- Semiconservative
- Conservative
- Dispersive
- Repressive
- 1 Clear All
17. Which of the following techniques is used to determine the sequence of nucleotides in a DNA molecule?
- Polymerase chain reaction (PCR)
- Gel electrophoresis
- Southern blotting
- DNA sequencing
- 4 Clear All
18. Which of the following is NOT a type of point mutation?
- Silent mutation
- Missense mutation
- Nonsense mutation
- Frameshift mutation
- 4 Clear All
19. The lac operon in bacteria is involved in the metabolism of:
- Lactose
- Glucose
- Galactose
- Sucrose
- 1 Clear All
20. The process by which genetic information from DNA is transferred to RNA is called
- Transcription
- Translation
- Replication
- Translocation
- 1 Clear All