Q: Which of the following best describes the Central Dogma of molecular biology?

$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

Which scientist's experiment with Streptococcus pneumoniae first demonstrated the 'transforming principle' that suggested DNA could transfer genetic information?

Accepted Answer

Griffith

Question 2

What was the main conclusion of the Hershey-Chase experiment using bacteriophages and radioactive labeling?

Accepted Answer

DNA is the genetic material

Question 3

Which scientist's X-ray diffraction images were critical in determining the double helix structure of DNA?

Accepted Answer

Rosalind Franklin

Question 4

According to Chargaff's rules, if a DNA sample contains 30% adenine, what percentage of thymine does it contain?

Accepted Answer

$$30\%$$

Question 5

Which enzyme is responsible for adding nucleotides to a growing DNA strand during replication?

Accepted Answer

DNA polymerase

Question 6

During transcription, which type of RNA is synthesized from a DNA template?

Accepted Answer

mRNA

Question 7

Which process describes the conversion of mRNA into a polypeptide chain?

Accepted Answer

Translation

Question 8

A mutation changes a codon from $$	ext{UAC} to$$ $$	ext{UAA}. $$What type of mutation is this?

Accepted Answer

Nonsense mutation

Question 9

Which of the following best describes the Central Dogma of molecular biology?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 10

Which of the following is a function of tRNA during translation?

Accepted Answer

Carries amino acids to the ribosome

Question 11

A patient has a point mutation in the gene coding for hemoglobin, resulting in sickle cell anemia. What type of mutation is this?

Accepted Answer

Missense mutation

Question 12

Which of the following best explains why eukaryotic mRNA must be processed before translation?

Accepted Answer

To remove introns and add a 5' cap and poly-A tail

Question 13

Which of the following is NOT a step in DNA replication?

Accepted Answer

Translation of mRNA

Question 14

Which of the following mutations is most likely to result in a nonfunctional protein?

Accepted Answer

Nonsense mutation

Question 15

Which process occurs in the nucleus and involves the synthesis of RNA from a DNA template?

Accepted Answer

Transcription

Question 16

Which of the following best describes the role of RNA polymerase in transcription?

Accepted Answer

It unwinds the DNA and synthesizes a complementary RNA strand

Question 17

A frameshift mutation is caused by which of the following?

Accepted Answer

Insertion or deletion of a nucleotide

Question 18

Which of the following is a difference between prokaryotic and eukaryotic gene expression?

Accepted Answer

Eukaryotic mRNA is processed before translation, while prokaryotic mRNA is not

Question 19

Which of the following best describes the effect of a nonsense mutation?

Accepted Answer

It changes an amino acid codon to a stop codon

Question 20

Which of the following best explains how the COVID-19 mRNA vaccine works in relation to protein synthesis?

Accepted Answer

It provides mRNA that is translated by host ribosomes to produce viral protein antigens

DNA and Protein Synthesis: Key Concepts and Processes

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