B.6C Protein synthesis/ Gene Expression 🏖️

A diagram of the steps in the production of a protein is shown.

which description identifies the purpose of Step A in this process?

• To correct mutations in the DNA sequence

• To produce an exact copy of the DNA molecule

• To copy the DNA of a gene sequence onto a strand of mRNA

• To assist in the folding of a protein

Tags

NGSS.HS-LS1-1

A model of transcription and a codon chart are shown.

Which amino acid would be coded from the DNA strand being transcribed?

• Cys

• Phe

• Ile

• Met

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NGSS.HS-LS1-1

NGSS.HS-LS1-6

a partial DNA segment and an mRNA codon chart are shown.

What amino acid sequence is encoded in the partial DNA segment?

• Serine- Threonine- Tyrosine

• Serine- Serine- Tyrosine

• Serine- Threonine- Methionine

• Serine- alanine- Methionine

Tags

NGSS.HS-LS1-1

The temperature at which American Alligator eggs are incubated will affect the gender of the offspring. Eggs kept at 30ºC tend to hatch mostly female, while eggs kept at 33ºC tend to hatch mostly male.

Which statement explains why the temperature affects the gender of alligator hatchlings?

• Gene repair occurs differently at different temperatures

• Gene expression is different at different temperatures

• Different parts of the embryo's DNA are deleted at different temperatures

• Different parts of the embryo's DNA are duplicated at different temperatures

E. coli has three genes that each code for different enzymes that break down lactose. Scientists conducted investigations about the production of these enzymes using samples of E.coli. Their results are shown in the table.

which conclusion about the production of the enzymes can be determined by analyzing the scientists' results?

• Gene expression for the enzymes was controlled by the temperature of lactose

• The genes for the enzymes were expressed in equal amounts during both experiments

• Gene expression for the enzymes was controlled by the presence of lactose

• The genes for the enzymes were mutated before being expressed by the presence of lactose

Snowshoe hares can be found living in the Rocky Mountains of new Mexico. during the summer months, when there is no snow on the ground, the snowshoe hare's coat color is typically brown. During the winter months, when the mountains are covered in snow, the snow shoe hare's coat is typically white.

Which statement describes the genetic basis for the seasonal changes in coat color?

• The snow causes mutations in the genes that regulate coat color so that snowshoe hares are adapted to their environment during winter months.

• The genes that control coat color are regulated by hormone signals that are altered by changes in the environmental factors.

• Sunlight causes cancer cells to develop in the bodies of snowshoe hares, resulting in an apparent brown-colored coat as a result of hair loss.

• The genes that control coat color in snowshoe hares are deleted from the genome during the summer months.

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NGSS.HS-LS4-4

What is the purpose of the cellular process shown in the image?

• Preserving genetic information for future generations

• Deleting the information in the sequence produced from the DNA template

• Transcribing information in the DNA sequence for use by the cell

• Producing more nucleotides for the DNA sequence

Tags

NGSS.HS-LS1-1

Which of the following is true regarding the process shown in the image?

• The process shown above is known as cloning and involves the production of RNA from protein molecules.

• The process shown above is known as replication and involves the production of DNA from RNA.

• The process shown above is known as transcription and involves the production of proteins from DNA.

• The process shown above is known as translation and involves the production of proteins from RNA.

What type of biomolecule is being produced in the image?

• Carbohydrate

• Lipid

• Nucleic Acid

• Protein

Tags

NGSS.HS-LS1-1

Which component of the DNA molecule provides instructions for the production of the protein and determines the traits of the organism?

• The phosphate group

• The sugar molecule

• The sequence of nitrogen bases

• The hydrogen bonds that hold the sugars to the bases

Tags

NGSS.HS-LS1-1