Biology Goal

What would the mRNA strand be after transcription of this DNA strand?

• UAU GCU

• GAT CAG

• GAG CAT

• GAG CAU

What would the mRNA strand be after transcription of this DNA strand?
TGA  AGT  CGG

• ACT TCA  GCC

• GAT  CAG  GCA

• ACU  UCA  GCC

• TCA  GCA  ACT

A contractile vacuole helps protists eliminate excess liquid. This is a "pumping" process which reduces pressure inside the cell and prevents the cell from bursting. What is most likely the source of energy for this process?

• DNA

• lipids

• ATP

• ribosomes

Tags

NGSS.MS-LS1-6

This diagram shows a Paramecium, a unicellular protist. When a chemical is added to the pond water in which the Paramecium lives, the Paramecium stops moving. Which structure is most likely affected?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

During translation, what does the tRNA deliver to the ribosomes?

• amino acids

• DNA

• mRNA

• proteins

Which will most likely cause an increase in the frequency of genetic mutations in humans?

• increased exposure to mold spores in the air

• increased exposure to rising levels of atmospheric CO₂

• increased exposure to bacteria in drinking water

• increased exposure to X-rays

Tags

NGSS.HS-LS3-2

Which molecules are joined together to make proteins?

• fatty acids

• nucleic acids

• amino acids

• acetic acids

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Salivary amylase is an enzyme in humans that breaks down starches. What substance would humans have difficulty digesting with this enzyme?

• lipids

• nucleic acids

• proteins

• carbohydrates

Which best explains why the rate of a biochemical reaction decreases at high temperatures?

• The activation energy increases.

• The shape of the enzyme changes.

• The enzyme-substrate complex forms.

• The bonds between substrates are broken.

What do both prokaryotic and eukaryotic cells contain?

• membrane-bound organelles

• linear chromosomes

• cytoplasm

• a nucleus