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