Unit 6 Exam Review

Why is DNA a useful molecule for storing hereditary information?

• DNA is a protein that helps in cellular respiration.
• DNA can only be found in the nucleus of eukaryotic cells.
• DNA is primarily used for energy storage in cells.
• DNA is useful for storing hereditary information because it encodes genetic instructions in its nucleotide sequence and can replicate accurately due to specific base pairing.

Tags

NGSS.HS-LS1-1

(True or False) Nucleotide bases can be randomly replaced with different nucleotide bases to increase variation.

• False, this would disrupt the information stored in the sequence

• True

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NGSS.HS-LS3-2

DNA only contains ________ specific bases.

• three
• five
• four
• six

If an RNA virus had double stranded RNA, what would the base pair be

• A-T and C-G
• A-U and G-T

• A-U and C-G
• A-C and T-G

What characteristic of DNA allows for genetic continuity from generation to generation?

• DNA transcription
• RNA processing
• Protein synthesis
• DNA replication

Which of the following explains the replication of DNA on the leading versus lagging strand of the parental DNA?

• The leading strand is synthesized continuously, while the lagging strand is synthesized in Okazaki fragments.
• The leading strand is synthesized in fragments, while the lagging strand is continuous.
• Both strands are synthesized continuously without interruption.
• The leading strand is synthesized in the opposite direction of the lagging strand.

What enzyme is used to place nucleotides during DNA replication?

• DNA polymerase
• Helicase
• Ligase
• RNA polymerase

Why is ligase required during DNA replication?

• Ligase is needed to unwind the DNA strands.
• Ligase helps in the synthesis of RNA primers.
• Ligase is responsible for proofreading the DNA sequence.
• Ligase is required to join Okazaki fragments during DNA replication.

What enzyme forms hydrogen bonds between the bases of the two DNA strands during DNA replication?

• DNA polymerase
• Helicase
• RNA polymerase
• Ligase

Why can a single gene make multiple proteins?

• A single gene can make multiple proteins due to alternative splicing and post-translational modifications.
• Multiple genes are required to produce different proteins.
• Proteins are made from RNA, not genes.
• A single gene can only produce one type of protein.

Tags

NGSS.HS-LS1-1