Inspire Biology

A student performed a first hand investigation to test the effect of temperature on the activity of an enzyme found in liver. The experimental set up and the height of the bubbles produced are indicated in the table below.

Identify a control in this experiment.

• The temperature

• Test tubes: 2, 4, 6, 8

• The detergent

• Test tubes: 1, 3, 5, 7

Tags

NGSS.HS-PS1-5

The diagram below shows the structure of a cell membrane. The molecule indicated by X is a:

• carbohydrate

• phospholipid

• nucleic acid

• protein

Which characteristic of prokaryotic cells can be used to distinguish them from eukaryotic cells?

• Prokaryotic cells contain large vacuoles

• Prokaryotic cells do not contain ribosomes

• Prokaryotic cells have a large surface area to volume ratio

• Prokaryotic cells do not contain membrane bound organelles

Select the row below which correctly compares prokaryotic and eukaryotic cells.

• A

• B

• C

• D

If enzyme Y is functioning at 25 °C and a pH of 7, under which conditions would the rate of enzyme action probably increase?

• When the temperature is kept the same and the pH is decreased to 6.

• When the temperature is decreased to 22 °C and the pH is kept the same.

• When the temperature is increased to 44 °C and the pH is kept the same.

• When the temperature is increased to 30 °C and the pH is increased to 8.

Tags

NGSS.HS-PS1-5

Osmosis and diffusion are processes that are vital for cellular function.

What process does the diagram show?

• Diffusion only

• Osmosis only

• Diffusion and osmosis

• Active transport

Is the following organism prokaryotic or eukaryotic?

• Prokaryotic

• Eukaryotic

• Neither

• Both

Is the following organism prokaryotic or eukaryotic?

• Prokaryotic

• Eukaryotic

• Neither

• Both

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

The phospholipid bilayer consists of...

• hydrophobic heads and hydrophilic, fatty-acid tails.

• hydrating heads and hydraulic, fatty-acid tails.

• hydrophilic heads and hydrophobic, fatty-acid tails.

• heads, shoulders, tails and toes.

The object shaded grey is:

• a phospholipid

• an intrinsic protein

• a peripheral protein

• a carbohydrate