Which organelle may often be referred to as the "gate keeper" because it controls what goes in and out of the cell?

A. the cytoplasm

B. the nucleus

C. the cell membrane

D. the mitochondrion

Which BEST describes the role of mitochondria in maintaining homeostasis for the cell?

A. Mitochondria control what crosses into and out of the cell.

B. Mitochondria manufacture and deliver proteins for the cell.

C. Mitochondria aid in the movement of organelles around the cell.

D. Mitochondria produce most of the energy that is used by the cell.

How does the nucleus contribute to maintaining homeostasis for the cell?

A. The nucleus stores water and food for the cell.

B. The nucleus directs cellular activities for the cell.

C. The nucleus produces chemical energy for the cell.

D. The nucleus packages and sorts proteins for the cell.

If a cell were compared to a school, which part of the school would represent the cell's nucleus?

A. the classroom walls because they give the structure to the school

B. the cafeteria cooks because they make food for the entire school

C. the principal because he or she controls all the activity in the school

D. the fence because it controls what enters and exits the school

The diagram above shows a cross section of a cell. Which statement BEST explains the function of the ribosomes in the cell?

A. The ribosomes break down and absorb material taken in by the cell.

B. The ribosomes transform energy from organic molecules into energy for the cell.

C. The ribosomes manufacture all the proteins required by the cell or exported by it.

D. The ribosomes sort and package proteins for use in the cell or export.

If the cells of a plant did not have a cell membrane, then the cells would most likely

A. lose their green color.

B. be more rigid and supported.

C. not be able to control what enters and exits the cells.

D. have to process sugar and make energy twice as fast.

How does the cell wall contribute to the function of the plant cell?

A. The cell wall creates and provides energy.

B. The cell wall stores and distributes DNA.

C. The cell wall sorts and packages proteins.

D. The cell wall provides strength and rigidity.

Morgan is creating models of plant and animal cells. She knows that the two types of cells do not share all of the same organelles. Which of the following identifies an organelle that is not contained in animal cells, and explains why animal cells do not require this organelle?

A. Animal cells do not contain cytoplasm because animals use lungs to conduct respiration.

B. Animal cells do not contain chloroplasts because animals do not conduct photosynthesis.

C. Animal cells do not have mitochondria because animals do not produce their own energy.

D. Animal cells do not have cell membranes because animals use bone structures for support.

The diagram shows a eukaryotic cell. Which organelle is labeled with an X, and what is its function?

A. the lysosome, which creates protein for the cell

B. the mitochondrion, which excretes wastes for the cell

C. the nucleus, which houses the genetic material for the cell

D. the chloroplast, which produces most of the energy for the cell

Mercedes created a table to show the functions of different cell structures.

What error did Mercedes make when creating her table?

A. Mercedes switched the functions of the cytoplasm and the cell membrane.

B. Mercedes switched the functions of the mitochondria and the chloroplast.

C. Mercedes switched the functions of the nucleus and the cell membrane.

D. Mercedes switched the functions of the chloroplast and the nucleus

If the chloroplasts in a plant cell stopped working, what would most likely happen to the cell?

A. Organelles would be allowed to float around.

B. The ability to make food would be lost.

C. Anything would be allowed to enter the cell.

D. The ability to reproduce would decrease.

What is the process of a cell eating?

A. endocytosis

B. exocytosis

C. reproduction

D. division

While playing basketball, Alex scrapes his knee. How does skin heal after being cut?

A. Skin cells make sugar.

B. Skin cells make proteins.

C. Skin cells swell to form new skin cells.

D. Skin cells divide to make new skin cells

If cells were a school building, the cell membrane would most likely be represented by which of the following?

A. intercom

B. lockers

C. teachers and students

D. walls and doors

The cell membrane controls what enters and exits the cell to maintain

Which structures carry out life functions within cells?

What is the significance of cell division?

Brian found a leaf that had recently fallen off a plant and was still green. He brought the leaf into his science class to look at it under the microscope. Many of the same type of organelles are visible under the microscope. What is the purpose of these organelles?