MOLBIO MODULE 3

Multiple Choice

Why is gene regulation at the molecular level significant for living organisms?

• It allows organisms to adapt to environmental changes by controlling gene expression.

• It prevents all genes from being expressed at once, saving energy and resources.

• It enables cell specialization and development of complex tissues.

• All of the above.

Multiple Choice

Which of the following is a reason why cells regulate gene expression?

• To save energy and space

• To increase the number of genes

• To make all proteins at all times

• To destroy DNA

Open Ended

Explain how gene regulation can prevent diseases such as cancer.

Multiple Choice

Which of the following statements about gene expression and cell specialization is/are correct?

• Different cell types express different sets of genes.

• All cells express the same genes at all times.

• Muscle cells and neurons express the same proteins.

• Gene expression is identical in all cell types.

Fill in the Blank

Cells respond to molecular cues such as ___ to turn genes on.

Fill in the Blank

In prokaryotes, the main control point for gene regulation is the ___ level.

Fill in the Blank

Fill in the blank: In prokaryotes, transcription and translation occur ___ .

Multiple Choice

Which of the following features distinguishes gene regulation in eukaryotes from prokaryotes?

• DNA is located in the cytoplasm in eukaryotes

• Transcription and translation are simultaneous in eukaryotes

• Eukaryotes have multiple levels of regulation

• Prokaryotes have post-transcriptional regulation

Multiple Select

Which statements about gene regulation are correct?

• Gene regulation ensures cells produce the right proteins at the right time.

• It conserves energy and maintains cellular function.

• Eukaryotic regulation is more complex due to compartmentalization.

• Prokaryotic regulation mainly occurs after translation.

Open Ended

Explain why eukaryotic gene regulation is considered more complex than prokaryotic gene regulation.

Open Ended

What are the two main stages of gene regulation and what happens during each stage?

Open Ended

Describe the roles of exons and introns in the structure of a gene.

Multiple Choice

Which of the following gene control regions is responsible for increasing the transcription rate by allowing activators to bind?

• Start Site

• Promoter

• Enhancer

• Silencer

Multiple Choice

What is occurring in this picture?

• Translation
• Replication
• Translocation
• Transcription

Multiple Choice

Transcription begins at sequences called

• Start Codons
• Promoters
• Origins
• Introns

Multiple Choice

Promoters are

• genes that code for individual proteins
• proteins that bind with DNA and prevent transcription
• DNA sequences near operons that regulate transcription
• small molecules that bind with repressor proteins

Multiple Choice

Which steps are involved in the process of transcription?

• Initiation, Elongation, Termination, Processing

• Replication, Elongation, Termination, Splicing

• Initiation, Replication, Termination, Processing

• Initiation, Elongation, Splicing, Translation

Fill in the Blank

In prokaryotes, transcription occurs in the ___

Multiple Choice

Which of the following is the correct sequence of steps in translation?

• Initiation, Elongation, Termination, Post-Translation

• Elongation, Initiation, Termination, Post-Translation

• Initiation, Termination, Elongation, Post-Translation

• Initiation, Elongation, Post-Translation, Termination

Multiple Choice

Which of the following is the correct product of the transcription process?

• Polypeptide chain

• mRNA, tRNA, rRNA

• DNA

• Protein

Open Ended

How do promoters, enhancers, and silencers contribute to gene regulation?

Multiple Select

Which of the following statements about genomic imprinting are correct?

• It is a reversible process.

• It is a type of mutation.

• It involves chemical modifications to silence one gene copy.

• Expression depends on parental origin.

Fill in the Blank

Genomic imprinting is a genetic process where only one copy of a gene is expressed, depending on whether it came from the ___ or the ___.

,

Open Ended

What is the difference between maternally and paternally imprinted genes?

Open Ended

Reflecting on today's lesson, how do you think understanding gene regulation at the molecular level could impact future scientific research or medical advancements?