BR 3 STAAR Review

A model of a biological process is shown. What is the purpose of this process?

• To replicate the DNA of an organism before cell division

• To assemble nucleotides in an nRNA chain along a DNA template

• To synthesis amino acids used to unzip strands of DNA and copy the genetic code

• To translate the genetic code into a specific sequence of amino acids

Tags

NGSS.HS-LS1-1

The initial steps in gene expression are modeled above. Double-stranded DNA first unwinds into two strands. Which process and product are represented in Diagram 2?

• Transcription

• Translation

Which of the following polypeptides is coded for by the following

mRNA sequence:

AUG GUU AAA CGA CAA UCC

• Val, Lys, Phe, Gly, Ser

• Met Asp, Phe, Ala, Arg

• Met, Val, Lys, Arg, Gln, Ser

• Ile, Gln, Lys, Asp, Gln, Ser

Tags

NGSS.HS-LS1-1

The arctic fox inhabits northern areas of North America. The same arctic fox is shown in the drawing at different times of the year. What causes this change in fur color?

• The alleles for fur color changes as the arctic fox grow older.

• Gene expression for fur color is regulated by latitude.

• The arctic fox has two traits for fur color that are determined at birth.

• Gene expression for fur color is regulated by temperature.

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

Different types of mutations can occur in DNA. The diagram represents a type of mutation. Which statement describes the mutation in the diagram?

• Deletion

• Substitution

• Insertion

Which of these is the direct result of an error in the transcription of a DNA nucleotide?

• The nuclear membrane is ruptured.

• Amino acids do not bond to tRNA.

• A codon sequence is incorrect.

• Transportation of nRNA does not occur.

Tags

NGSS.HS-LS3-2

A mutation that occurs in the gametes of an organism will most likely be transferred to which of the following?

• The siblings of the organism

• The offspring of the organisms

• The other organism living nearby

• The mating partner of the organism

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

A section of a nucleic acid is shown above. The process represented in the diagram produces a molecule that is complementary to the template strand of DNA. What type of molecule is produced?

• New DNA

• Polypeptide

• Messenger RNA

• Carbohydrate

How do enzymes control chemical reactions in the body?

• Enzymes speed up chemical reactions.
• Enzymes slow down chemical reactions.
• Enzymes increase the activation energy of a reaction.
• Enzymes inhibit the catalysts of a reaction.

How do enzymes speed up chemical reactions?

• By raising activation energy

• By lowering activation energy

• By creating multiple products

• By removing the activation energy

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5