The arrow indicates that the cell membrane is carrying out the process of

• respiration

• diffusion

• cell recognition

• active transport

State one reason why a glucose molecule is more likely than a sucrose molecule to diffuse through an artificial membrane.

• Glucose is larger than sucrose

• Sucrose is too large to pass through the cell membrane

• Sucrose is too small to pass through the cell membrane

• The size of the molecule does not make a difference

A student was setting up beakers that contained different solutions in order to conduct a laboratory investigation, but the next day he could not tell which beaker contained the starch and water mixture. In order to fi nd out which beaker contained starch, he took a small sample from each of the beakers and conducted a test for starch on each of them.

Describe the test for starch that the student should use and the result that would indicate the presence of starch.

• Add glucose indicator and heat to see if there is a color change

• Add starch indicator and see if it turns amber

• Add starch indicator and see if it turns navy blue/black

• Add glucose indicator to see if it turns black

An ameba is a single-celled, heterotrophic organism. In order to meet its energy needs, it relies directly on the interaction of which cell structures?

• chloroplasts and the cell membrane

• the cell membrane and mitochondria

• nucleus and ribosomes

• vacuoles and the nucleus

Which cell structure plays a direct role in the release of this chemical from the cell?

• nucleus

• chloroplast

• ribosome

• cell membrane

Based on these results, it can be concluded that the specifi c protein that was added to the samples was

• a salt solution

• a pancreatic hormone

• a new indicator

• a biological catalyst

A class carried out an experiment to test the effect of rest time after exercise on the breathing rate. Each member of the class ran up and down stairs for 60 seconds. After exercising, they rested. The students then measured their rate of respiration by counting the number of inhales and exhales per minute for 7 minutes. The class then averaged their data.

What is the dependent variable?

• Amount of excercise

• Amount of Breaths

• How many times they ran up the stairs

• The time

The ATP molecule above is commonly used to

• actively transport molecules in an organism

• diffuse water across a membrane

• move molecules from a high to a low concentration

• balance the nutrients in an ecosystem

What organelle is this?

• Mitochondria

• Chloroplast

• Ribosome

• Vacuole

What process occurs here?

• Photosynthesis

• Respiration

• Active Transport

• Diffusion