Gene Expression and DNA Review

Why are cells in the skeletal system sturdy, where as skin cells are soft and stretchy? 

• due to the specific proteins that are synthesized (made) by specific cells

• due to DNA

• due to underlying mutations and specifications of the DNA

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NGSS.HS-LS1-1

What functions as the on off switch for mRNA transcription

• transcription factors

  (Gene Expression)

• translation factors

• transgenic factors

• transportation factors

DNA molecule segment is : TTACGCAAG The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.

• Substitution

• Deletion

• Insertion

• Inversion

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NGSS.HS-LS3-2

What mutation has occurred here?  T-G-A-C-C-A T-G-A-G-C-A

• Substitution

• Deletion

• Insertion

• Frameshift 

Tags

NGSS.HS-LS3-2

A change in the sequence GAG to GGG would 

• change the amino acid from Glu to Gly

• changes the amino acid from Leu to Phe

• change the amino acid from Leu to STOP

• does not change the amino acid

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

The Himalayan rabbit's habitat has cold, snowy winters and mild summers. The body is typically covered in white fur except for the nose, feet, tail, and ears, which are covered in black fur.

A scientist shaved an area of white fur on the back of a Himalayan rabbit and placed an ice pack over the shaved area . The shaved area grew black fur.

Which of these best explains why the hair that grew back where the Ice pack was placed was black and not white?

• The white hair mutated to black hair as the rabbit's body temperature decreased.

• The coat color changed from white to black with the age of the rabbit.

• The genes for black hair were activated by specific temperatures.

• White hair only grows during certain times of the year.

Tags

NGSS.MS-LS1-5

CRISPR-Cas9 is a genetic modification technique that edits parts of the genome of an organism . Using this technique scientists can add, remove, or modify sections of the DNA sequence.

How can scientists use this technique to control gene expression?

• By determining the number of chromosomes in an organism

• By identifying how closely related one individual is to another

• By calculating the number of genes different organisms produce

• By activating or deactivating specific genes

Tags

NGSS.HS-LS3-2

Each strand of a DNA molecule contains nitrogenous bases that pair with other nitrogenous bases in very specific ways. A diagram of a section of DNA is shown.

Which DNA strand is complementary to the one shown above?

• 
• 
• 
• 

How is information for a specific protein carried on the DNA molecule?

• as a sequence of nucleotides

• in the double helix shape of the condensed chromosome

• in the ratio of adenines to thymines

• as a pattern of phosphates and sugars

Tags

NGSS.HS-LS1-1

The arctic fox inhabits northern area of North America. The same arctic fox is shown in the drawing during different times of the year.

What causes this change in the fur color?

• the genes for fur color change as the arctic fox grows older

• gene expression for fur color is regulated by magic

• 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-LS4-5