What is the function of the organelle pictured?

capture sun's energy to make sugar

If cells are placed in a strong sugar solution, water will _____.

pass from the cells to the sugar solution

pass from the sugar solution to the cells

Which if the statements below is not true of eukaryotic cells?

they can make unicellular or multicellular organisms

they have membrane bound organelles

Which is an example of osmosis?

water moving into the root cells of a plant

potassium ions moving in and out of an animal cell

carbon dioxide moving into the leaf cells of a plant

oxygen moving into the bloodstream from the lungs

The inner membrane of the mitochondrion has many folds called cristae. Which statement best explains the significance of this structure?

The folds increase the surface area for cellular respiration (breaking down glucose to release energy: ATP)

The folds increase the absorption of carbon dioxide

The folds increase the absorption of oxygen.

The folds increase the surface area for photosynthesis (absorbing sunlight to produce glucose)

Which of the following is not a form of passive transport?

moving oxygen from high to low concentration

Elodea, a freshwater plant, is being viewed under a microscope. Which would most likely occur if a saline solution were placed on the Elodea? (Hint: Saline solution is salty.)

The Elodea cells would decrease in size.

The Elodea cells would increase in size.

The Elodea cells would immediately enter into mitosis.

The Elodea cells would immediately enter into meiosis.

Aerobic Respiration means

that organisms must breathe air

that organisms break down complex organic molecules to yield energy

The yellow box represents a cell with a semi-permeable membrane. The small blue dots represent molecules of water, and the larger gray dots represent a solute such as sugar or salt. The membrane is thin enough for water to pass through, but it is not thin enough for the solute pass.What will happen to the substances in this diagram to bring the concentrations closer to equilibrium?

Water will flow out of the cell into the surrounding environment

The solute will flow into the cell from the surrounding environment

Water will flow into the cell from the surrounding environment

Nothing will change- it is already in equilibrium

Which of the following best describes the process of diffusion?

Movement of molecules from an area of higher concentration to an area of lower concentration without energy

The movement of molecules from and area of lower concentration to an area of higher concentration caused by adding energy.

The movement of molecules from an area of higher concentration to an area of lower concentration caused by adding energy

Movement of molecules from an area of low concentration to and area of higher concentration without energy.

Endocytosis and exocytosis are types of active transport that utilize a vesicle to move substances into and out of the cell. This type of transport is considered active transport because

it moves substances from a high to low concentration

Cell membranes (plasma membranes) help organisms maintain homeostasis by controlling what substances may enter or leave cells. Some substances can cross a cell membrane through passive transport, while other substances can only cross a cell membrane through active transport. What is the difference between active and passive cellular transport?

Active transport requires the cell to expend energy and passive transport does not

Active transport requires the cell to form vesicles, while passive transport is done only through osmosis

Active transport is the only form of transport that requires the use of carrier proteins

passive transport is the only form of transport that requires the use of carrier proteins

Examine the following diagrams of plant cells. Each cell has been placed in a different solution. The cell in diagram 2 has been placed in a solution that contains _______ the interior of the cell.

the same concentration of solute as

a lower concentration of solute than

Which of the following is an example of diffusion?

Carbon dioxide moving from high to low out of cells

Oxygen going from a low to high concentration in cells

water moving from high to low concentration in cells

A large molecule moving into a cell by fusing with the plasma membrane creating a vacuole

Cell Transport

Biology

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

RNA and DNA are which type of organic compound?

carbohydrate

protein

lipid

nucleic acid

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is not a characteristic of enzymes?

specific to one type of substrate

may be denatured in extreme temperatures and pHs

lowers the activation energy of a reaction

can only be used one time

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

All the following molecules are part of the cell membrane except

cholesterol.

lipids.

proteins.

nucleic acids.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following organisms do not have cell walls?

plants

animals

fungi

bacteria

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What structure is used to stabilize the plasma membrane by keeping the fatty acid tails from sticking together?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where are you least likely to find water in the structure above?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The fluid mosaic model describes the cell membrane as

a double layer of protein

two layers of carbohydrates

a double layer of phospholipids with protein molecules embedded within it

one layer of protein

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Cell Transport

RNA and DNA are which type of organic compound?

Which of the following is not a characteristic of enzymes?

All the following molecules are part of the cell membrane except

Which of the following organisms do not have cell walls?

What structure is used to stabilize the plasma membrane by keeping the fatty acid tails from sticking together?

Where are you least likely to find water in the structure above?

The fluid mosaic model describes the cell membrane as

Which structure in this picture is the cell control center and contains DNA?

Which structure in this picture is responsible for synthesizing proteins (assembling proteins)?

What is the function of the organelle pictured?

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