Topic 7: Molecular Genetics Period 1

Translation happens in the

• Nucleus
• Ribosome
• Chloroplast
• Smooth Endoplasmic Reticulum

Which of the following is an example of post-transcriptional control of gene expression?

• the addition of methyl groups to cytosine bases of DNA
• the binding of transcription factors to a promoter
• the removal of introns and splicing together of exons
• gene amplification contributing to cancer

A distal control region that activators bind to are bent to contact mediator proteins and form the transcription initiation complex

• enhancers
• promoters
• repressors
• transcription factors

During DNA methylation

• mRNA molecules are prohibited from being translated
• a methyl cap is added to the 5' end to prevent DNA degredation
• transcription factor proteins recruit RNA polymerase initiating transcription
• chromatin becomes more tightly packed

_______ is to transcription as ________ is to translation.

• mRNA / Amino Acid Chain
• Amino Acid Chain / mRNA
• Ribosome / Nucleus
• mRNA / tRNA

What is the relationship between a protein, the cell, and DNA?

• DNA is produced by protein which is produced in the cell
• Protein is composed of DNA which is produced in the cell
• DNA controls the production of protein in the cell
• A cell is composed of DNA and protein

Tags

NGSS.HS-LS1-1

Which sections of mRNA are cut out and discarded before the mRNA leaves the nucleus?

• Exons
• Introns
• Genes
• Amino acids

A chemical modification of DNA that does not affect the nucleotide sequence of a gene but makes that gene less likely to be expressed.

• methylation
• acetylation
• alternative splicing
• snRPs

Translation is a process in eurkaryotic cells takes place in the:

• Cytoplasm
• Nucleus
• Nucleolus
• Golgi Bodies

Tags

NGSS.HS-LS1-6

Transcription begins at sequences called

• Start Codons
• Promoters
• Origins
• Introns