Biology Questions and Answers – Molecular Basis of Inheritance – Regulation of Gene Expression

«
»

This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on “Molecular Basis of Inheritance – Regulation of Gene Expression”.

1. In which of the following levels can gene expression not be exerted?
a) Transitional level
b) Transcriptional level
c) Reverse transcriptional level
d) Processing level
View Answer

Answer: c
Explanation: In eukaryotes, the regulation of gene expression occurs at various levels. They are transcriptional level, processing level, transport of mRNA from the nucleus to the cytoplasm and translational level.
advertisement

2. Which of the following products are produced when lactose is hydrolysed?
Glucose and Galactose molecule diagram
a) Glucose and Fructose
b) Glucose and Galactose
c) Two molecules of glucose
d) Fructose and Galactose
View Answer

Answer: b
Explanation: Lactose is a disaccharide carbohydrate molecule. On hydrolysis of a disaccharide, we get 2 molecules of monosaccharides. Likewise, when we hydrolyse a single molecule of lactose, we get one molecule of glucose and galactose. On hydrolysis of Sucrose, we get glucose and fructose. On hydrolysis of Maltose, we get 2 molecules of glucose.

3. Regulatory protein can act both as an activator and a repressor.
a) True
b) False
View Answer

Answer: a
Explanation: The regulatory proteins have the ability to act both as an activator and a repressor. They will be positive when they are activators. They will be negative when they are repressors.
advertisement
advertisement

Sanfoundry Global Education & Learning Series – Biology – Class 12.

To practice all areas of Biology, here is complete set of 1000+ Multiple Choice Questions and Answers.

advertisement

Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

advertisement
advertisement
Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn | Youtube | Instagram | Facebook | Twitter