Unit 1 Quiz_ Review

The fluid-mosaic model of the cell membrane suggests that the membrane is primarily composed of proteins and lipids. Which of the following is a function of proteins in the cell membrane?

• Proteins help keep the shape of the cell membrane

• Proteins allow larger substances to enter and exit the cell through protein channels.

• Proteins give energy to the cell membrane

• Proteins don't do anything, they just don't.

Which two organelles have a double membrane and are both responsible for making energy in cells?

• nuclei and Golgi apparatuses

• vacuoles and lysosomes

• chloroplasts and mitochondria

• Cell membrane and Rough ER

The arrows in the illustration indicate the movement of materials into and out of a single-celled organism.

Which of the following most likely involves the movements indicated by all of the arrows?

• photosynthesis

• Cellular Respiration

• Electron Transport Chain

• Recycling

Cyclins are the enzyme that scientist have discovered triggers a cell to begin dividing. When the right amount of cyclin is produced, a cell divides normally and produces two daughter cells. What would most likely happen if too much cyclin was released?

• A person might grow too big.

• A cell would produce the wrong type of cell.

• Cytokinesis would not occur.

• A person might develop a tumor.

Which picture represents Anaphase?

• A

• B

• C

• D

• E

In which picture would spindle fibers and centrioles begin to appear?

• A

• B

• C

• D

• E

Which picture shows Metaphase?

• A

• B

• C

• D

• E

This diagram shows which type of transport?

• Passive Transport

• Osmosis

• Diffusion

• Active Transport

Which statement best describes what enzymes do?

• They influence the rate of chemical reactions.

• They become the building blocks of polymers.

• They become the building blocks of polymers.

• They speed up the conduction of nerve impulses.

A student is investigating the role of cellular transport in maintaining homeostasis. The student covers one end of a tube containing a 10% sugar solution with a semipermeable membrane. The student places the tube into a beaker that contains a 5% sugar solution. The student observes water from the beaker entering the tube. Which best describes the type of cellular transport that the student is investigating?

• The student is investigating the active transport of diffusion

• The student is investigating the active transport of osmosis.

• The student is investigating the passive transport of diffusion.

• The student is investigating the passive transport of osmosis.