Unit 4 Test Review

A nucleotide of DNA may contain adenine, guanine, cytosine, or thymine. What is each of these components?

• 5-carbon sugar
• nitrogenous base
• phosphate group
• nucleic acid

The image shows a nucleotide, a building block of the DNA molecule. From left to right, what are the names of the components?

• 5-carbon sugar, nitrogenous base, phosphate group
• nucleic acid, 5-carbon sugar, amino group
• 5-carbon sugar, nitrogenous base, carboxyl group
• nitrogenous base, 5-carbon sugar, phosphate group

Tags

NGSS.HS-LS1-1

The diagram represents a portion of one strand of a DNA molecule. Which of the four DNA strands match the strand in the diagram by base pairing?

• GGTGACT
• CCATATG
• GGTCGAT
• CCTAGTG

Tags

NGSS.HS-LS1-1

The diagram shows the process in which pre-mRNA is changed into mRNA. Which events are described in the diagram?

• Introns are removed, and remaining exons are spliced together.
• Exons are removed, and remaining introns are spliced together.
• Introns and exons are removed, and remaining DNA is spliced together.
• Introns are removed, condensed, and then combined again.

Kacey and Tyler are studying the amino acid chart and the following codons: CGU and AGA What conclusion might they make about translation?

• Sometimes multiple codons can be translated into the same amino acid.
• Each RNA combination codes for a unique amino acid.
• Both are translated into Serine.
• Methionine is the most common amino acid.

Tags

NGSS.HS-LS1-1

Transcribe the following DNA sequence and then translate it into amino acids. TACCCGAGCTTCGGAACT

• Start-Glycine-Serine-Lysine-Proline-Stop
• Start-Proline-Serine-Phenylalanine-Glycine-Stop
• Start-Methionine-Glycine-Serine-Lysine-Stop
• Start-Alanine-Threonine-Lysine-Glycine-Stop

Tags

NGSS.HS-LS1-1

Use the codon wheel to translate the following RNA sequence before and after it is mutated. Before mutation: AUG-CCA-UCG-UUA-GCG-UAA After mutation: AUG-CCU-UCA-CUA-GCG-UAG Did the amino acids change?

• NO
• YES

Tags

NGSS.HS-LS3-2

What are three tasks that DNA must be able to perform in all organisms? Select three answer choices.

• It must store genetic information.
• It must discard foreign genes.
• It must instruct cells to produce needed molecules.
• It must copy itself.
• It must move to locations throughout the cell.

Tags

NGSS.HS-LS3-2

In which ways is RNA different from DNA? Select three properties that apply to RNA, but NOT DNA.

• generally single-stranded
• contains thymine
• contains uracil
• contains the sugar ribose
• contains the sugar deoxyribose

Analyze the data about nitrogenous base content of DNA from various species. Which three statements are supported by the data?

• In any one species, the amount of adenine closely approximates that of thymine.
• In any one species, the amount of guanine closely approximates that of cytosine.
• The amount of A, T, G, and C in DNA is constant among species.
• The amount of A, T, G, and C in DNA varies among species.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2