Bio 7.2-7.3 questions

Which statement concerning ATP and activity within the cell is correct?

ATP is produced most efficiently by structure C

Which process requires cellular energy to move molecules across the cell membrane from a region of lower concentration to a region of higher concentration?

Active transport

Solar energy is used to produce energy-rich compounds in

Chloroplast

Which statement best describes the plasma membrane of a living plant cell?

It selectively regulates the passage of substances into and out of the cell

The diagram shown represents the change that occurred after a fluid was added to a wet mount of some elodea leaf cells. Which fluid was most likely added to the wet mount?

Salt solution

Which statement regarding the functioning of the cell membrane of all organisms is not correct?

The cell membrane forms a barrier that keeps all substances that might harm the cell from entering the cell

Cell membranes are said to be selectively permeable. Which statement best explains what selectively permeable means?

The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell.

Which substance can enter a cell by di!usion without having to be digested?

Water

Which two processes are most closely associated with structure A?

active transport and diffusion

Which set of functions is directly controlled by the cell membrane?

active transport, recognition of chemical messages, protection

Active transport is di!erent from passive transport in that active transport involves

an expenditure of energy

A structure that performs a specialized function within a cell is known as

an organelle

In the cell shown below, which lettered structure is responsible for the excretion of most cellular wastes?

b- membrane

Which substances may pass through a cell membrane by simple diffusion?

carbon dioxide and water

One difference between plant and animal cells is that animal cells do not have

chloroplasts

Plant cells can synthesize energy-rich organic molecules, and later break them down to extract that energy for performing life processes. These activities require direct interaction between the

chloroplasts and mitochondria

Transport of molecules within animal cells is assisted by a system of internal membranes that make up the

endoplasmic reticulum

A white blood cell ingests, then digests, a number of bacteria. Which cell organelles were directly responsible for the digestion of the bacteria?

lysosomes

While viewing a slide of rapidly moving sperm cells, a student concludes that these cells require a large amount of energy to maintain their activity. The organelles that most directly provide this energy are known as

mitochondria

The organelle that is the site of cellular respiration is the

mitochondrion

The largest amount of DNA in a plant cell is contained in

nucleus

A biologist diluted a blood sample with distilled water. While observing the sample under a microscope, she noted that the red blood cells burst. This bursting is most likely the result of which process?

osmosis

The process by which large undissolved particles are brought into a cell being engulfed is known as

phagocytosis

Which organelle aids in the maintenance of cell homeostasis by selectively regulating the passage of materials into and out of the cell?

plasma membrane

The ribosome is an organelle that functions in the process of

protein synthesis

Most cell membranes are composed principally of

proteins and lipids

Which suspension, when viewed under the microscope, would contain red blood cells that had swollen and burst apart?

red blood cells and distilled water

What is the main function of a vacuole in a cell?

storage

vacuole does what?

stores food, water, and waste

A characteristic common to both di!usion and active transport is that

the movement of molecules occurs