Module 2 OCR 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

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

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.

What would help cells responsible for exchanging materials, to function better?

• Small membrane bound organelles

• Large membrane bound organelles

• Greater Surface Area to Volume ratios (SA:V)

• Smaller Surface Area to Volume ratios (SA:V)

Tags

NGSS.HS-LS2-5

What I should do when I am prepared and ready to view my slide under the microscope?

• Place slide on stage without stage clips
• Keep light source off and just change the diaphragm 
• Start with highest objective 
• Use Coarse Adjustment Knobs to move stage up, but make sure it doesn't touch objective