Biology Unit

How does the DNA in a prokaryote differ from a eukaryote?

• Prokaryote has circular DNA, Eukaryotes has linear DNA

• Prokaryote has single stranded DNA, Eukaryotes has double stranded DNA

• Prokaryote has linear DNA, Eukaryotes has prokaryote DNA

• Prokaryote has double stranded DNA, Eukaryotes has single stranded DNA

Which enzyme is responsible for relaxing supercoiling in front of the replication fork?

• helicase

• DNA polymerase

• topoisomerase

• ligase

Which enzyme is responsible for unzipping the DNA strands?

• helicase

• DNA polymerase

• topoisomerase

• ligase

Which enzyme is responsible for joining the fragments on the lagging strand?

• helicase

• DNA polymerase

• topoisomerase

• ligase

How do the three types of RNA work together?

• mRNA carries message, tRNA carries amino acids, and rRNA makes ribosome

• mRNA makes ribosomes, tRNA carries amino acids, and rRNA relays information

• mRNA carries amino acids, tRNA transfer message, and rRNA makes ribosome

• mRNA is made, tRNA holds the DNA in place, and rRNA removes the deoxyribose

What is the flow of genetic information in cells from DNA to protein? (Central Dogma)

• RNA to DNA to protein

• DNA to RNA to protein

• protein to DNA to RNA

• RNA to protein to DNA

Tags

NGSS.HS-LS1-1

Protein molecules around which DNA is tightly coiled in chromatin

• Histones

• Whey

• Casein

• Hemoglobin

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

The parts of a gene that do NOT code for amino acids in a protein are called

• introns

• exons

• codons

• anticodons

The production of mature mRNA in eukaryotes involves

• cutting introns out and spicing exons together

• adding the 5' cap

• adding the 3' poly A tail

• all of these are correct