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Discovering DNA and RNA Trivia Quiz

So do you think you know the basics about DNA and RNA? Test your knowledge with this quiz!

A multiple-choice quiz by anna93. Estimated time: 3 mins.

Author
anna93

Time
3 mins

Type
Multiple Choice

Quiz #
316,107

Updated
Dec 03 21

# Qns
10

Difficulty
Average

Avg Score
6 / 10

Plays
1693

One at a Time - Single Page - Timed Game

Question 1 of 10

1. In DNA replication, which enzyme(s) binds to the single stranded DNA strand and builds a short RNA primer sequence? Hint

polymerase

ligase

restriction enzymes

primase

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Question 2 of 10

2. What is not a difference between DNA and RNA? Hint

RNA contains ribose sugar

DNA has the sugar deoxyribose

RNA contains a single phosphate group

DNA is double stranded

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Question 3 of 10

3. Which of these plays an active role in the transcription step of protein synthesis? Hint

RNA polymerase

mRNA

tRNA

None of these

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Question 4 of 10

4. Which nucleic acid cannot leave the nucleus? Hint

RNA

Neither DNA nor RNA leave the cell nucleus

Both DNA and RNA can leave the cell nucleus

DNA

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Question 5 of 10

5. Which nitrogenous base is not found in DNA? Hint

adenine

thymine

cytosine

uracil

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Question 6 of 10

6. In a DNA molecule, what type of linkage links the nucleotides together? Hint

phosphodiester linkages

ester linkages

peptide bonds

ether linkages

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Question 7 of 10

7. In RNA base pairing, what base pairs up with adenine? Hint

thymine

guanine

uracil

cytosine

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Question 8 of 10

8. Which of the following is not a nucleotide? Hint

deoxyribose cytosine diphosphate

ribose phosphate

guanine triphosphate

uracil monophosphate

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Question 9 of 10

9. What is the backbone or the outer ends of the structure of DNA made up of? Hint

sugar and phosphate groups

nucleic acids

amino acids

adenine, thymine, cytosine and guanine

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Question 10 of 10

10. What joins the chains of bases in DNA? Hint

double bonds

hydrogen bonds

single carbon bonds

phosphate groups

Quiz Answer Key and Fun Facts

1. In DNA replication, which enzyme(s) binds to the single stranded DNA strand and builds a short RNA primer sequence?

Answer: primase

Primase it the enzyme that creates a short RNA primer sequence so that DNA polymerase 3 can bind to the primer and link the adjacent nucleotides together. Ligase is the enzyme that links the okazaki fragments together. Restriction enzymes are used to cut DNA in DNA recombination.

2. What is not a difference between DNA and RNA?

Answer: RNA contains a single phosphate group

RNA is single stranded while DNA is double stranded. DNA's double stranded nature gives it the double helix structure.

3. Which of these plays an active role in the transcription step of protein synthesis?

Answer: RNA polymerase

In protein synthesis, the DNA molecule uncoils and unzips. Then the RNA polymerase reads the bases and the result is a complementary strand, mRNA, which is also known as messenger RNA which leaves through the nuclear pores. This happens in the transcription part of protein synthesis.

4. Which nucleic acid cannot leave the nucleus?

Answer: DNA

DNA cannot leave the cell nucleus in order to prevent loss of genetic information.

5. Which nitrogenous base is not found in DNA?

Answer: uracil

Uracil is only found in RNA while thymine is only found in DNA.

6. In a DNA molecule, what type of linkage links the nucleotides together?

Answer: phosphodiester linkages

Nucleotides are monomers of nucleic acids. They are linked together by phosphodiester linkages between the phosphate group of one nucleotide and the sugar molecule of the next nucleotide.

7. In RNA base pairing, what base pairs up with adenine?

Answer: uracil

In DNA, the base thymine pairs up with adenine. Since thymine is not present in RNA, uracil, which is only present in RNA pairs up with adenine in place of thymine.

8. Which of the following is not a nucleotide?

Answer: ribose phosphate

Ribose phosphate is not a nucleotide because it does not contain a nitrogenous base. All nucleotides are made up of a nitrogenous base, a sugar and one or more phosphate groups.

9. What is the backbone or the outer ends of the structure of DNA made up of?

Answer: sugar and phosphate groups

Sugar and phosphate groups are present at either end of the chain of bases in DNA and form the backbone of it.

10. What joins the chains of bases in DNA?

Answer: hydrogen bonds

The bases of the molecule point inward and hydrogen bonds link the two chains of bases. This results in the molecule forming a double helix.

Source: Author anna93

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