Hanek Cell Unit Test

The concentration in the original solution was 80% because the mass of the model cell was 10 grams at 80% which is also what the original mass of the model cell was before it was placed in a solution

What was the concentration of water in the original blue solution? State evidence in support of your answer.

Cell walls and chloroplasts

Which features are found in plant cells but not animal cells?

helps a cell keep its shape

Which of the following is a function of the cytoskeleton?

moves substance against concentration gradient

Which of the following phrases best describes active transport?

Lysosomes

Which organelle breaks down organelles that are no longer useful?

Mitochondrion

Which organelle converts the chemical energy stored in food into compounds that are more convenient for he cell to use?

Chloroplast

Which organelle would you expect to find in plant cells but not animal cells?

Lysosomes

Which organelles are involved in defending a cell against viruses?

Lysosomes and vesicles

Which organelles are involved in the process called endocytosis?

Ribosomes

Which organelles are present both inside the nucleolus and on the surface of the ER?

Cell membrane and cytoskeleton

Which pair of organelles works together to give structure and support in animal cells?

Supplies energy to the cell

Which phrase best describes the mitochondria?

Requires no energy from the cell

Which phrase best describes the process of facilitated diffusion?

A vesicle fuses to the cell membrane and its contents leave the cell

Which sentence best describes exocytosis?

Ribosome, ER, Golgi apparatus

Which sequence correctly traces the path of a protein in the cell?

it is surrounded by a double membrane

Which statement is true about a nucleus?

Water movement into the cell is dependent on the percent concentration of solutes both inside and outside the cell.

Which statement provides a conclusion about the transport of water in and out of cells based on the results of the student's experiment?

fewer solutes than the cell

A solution that is hypotonic to a cell has

continue to move across the membrane in both directions

During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will:

ER

Chief cells are found in glands that line the inside of he stomach. These cells secrete large amounts of enzymes to aid in food glucose. Which cellular structure will be more abundant in chief cells because of their high rate of enzyme secretion?

Active Transport

The diagram below represents movement of a large molecule across a membrane. Which process is represented in the diagram? (Diagram includes ATP)

Cell A only

In the diagram below, the dark dots indicate small molecules. These molecules are moving out of the cells, as indicated by the arrows. The number of dots inside and outside of the two cells represents the relative concentration of the molecules inside and outside of the cells. ATP is being used to move the molecules out of the cell by: (Cell A molecules moving L to H Cell B molecules moving H to L)

secondary active transport

Na+ concentration gradient drives glucose transport ATP energy pumps Na+ back out

Double sided active transport. Na and K pump

Na+ starts inside the cell and is pumped out. K+ starts outside the cell and is pumped in. Another channel opens up to let Na+ back in

The cell membrane is made up of two layers of phospholipids.

Which structural feature of the cell membrane allows molecules such as oxygen and carbon dioxide to diffuse into and out the cell?

Structure C (vacuole)

Which structure in the cell shown in Figure 7-2 above stores materials such as water, salts, proteins, and carbohydrates?

Structure A (Golgi)

Which structure in the cell shown in Figure 7-3 above modifies, sorts, and packages proteins and other materials for storage or release from the cell?

ribosome

Which structure makes proteins using coded instructions that come from the nucleus?

microtubules and microfilaments

Which structures are involved in cell movement?

DNA, Nucleus, Ribosome

Which structures are present in animal cells?

Cell wall, DNA, Ribosome

Which structures are present in bacteria cells?

Because the concentration inside the tube was lower then on the outside, so some of the molecules went inside

Why did the model cell that was placed in 100% water increase in mass