DNA Replication

Dr. Tanaka discovered a new virus. The virus has a single strand of a nucleic acid, but she does not know if it is DNA or RNA. After running tests, she concludes that it is DNA. Which of the following would lead her to that conclusion?

• it contains uracil

• it contains adenine

• it contains thymine

• it contains cytosine

This gene segment codes for a peptide in humans.

GCT GTG TGA GGC AGA

What is the expected mRNA sequence when the gene segment is transcribed in transgenic mice?

• GCT GTG AGG CAG AAC

• CGA CAC UCC GUC UUG

• CGA CAC ACU CCG UCU

• GCU GUG AGG CAG AAC

Tags

NGSS.HS-LS1-1

Which best explains why DNA replication in the human body is significant?

• it is needed for cell division

• it is necessary for protein synthesis

• it replaces any damaged DNA cells

• it produces RNA strands

Tags

NGSS.HS-LS1-4

What aspect of the DNA molecule encodes hereditary information concerning an organism’s traits?

• the molecular mass

• the sequence of base pairs

• the distribution of electrical charges

• the folded three-dimensional shape

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Which of the following aspects of a DNA molecule is responsible for determining the traits of an organism?

• number of phosphates

• amount of thymine

• sequence of nucleotides

• type of bond between bases

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Which part of a DNA molecule represents encoded information?

• phosphate

• sugar

• guanine

• hydrogen bond

Transcription (the process of producing RNA) of the sequence TTAAG produces which sequence?

• TTAAG

• UUAAG

• AAUUC

• AATTC

The DNA sequence ACTCG produces which mRNA sequence during transcription?

• TGAGC

• UGAGC

• ACTCG

• ACUCG

How many sugar-phosphate strands exist in each RNA molecule?

• 1

• 2

• 3

• 4

How is the DNA sequence AATTA replicated in a new strand during semiconservative replication?

• AATTA

• AATAA

• TTATT

• TTAAT