Bio

Which structure is not part of the endomembrane system?

• nuclear envelope

• chloroplast

• Golgi apparatus

• plasma membrane

Which structure is common to plant cell and animal cell?

• chlorplast

• wall made of cellulose

• mitochondrion

• centroile

Which of the following is present in a prokaryotic cell?

• mitochondrion

• ribosome

• nuclear envelope

• chloroplast

Cyanide binds to at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the cyanide will be found within the

• mitochondria

• ribosomes

• peroxisomes

• lysosomes

Tags

NGSS.HS-LS1-7

What cell will be best for studying lysosomes?

• muscle cell

• nerve cell

• phagocytic white blood cell

• bacterial cell

In what way do the membranes of a eukaryotic cell vary?

• Phospholipids are found only in certain membranes.

• Certain proteins are unique to each kind of membrane

• Only certain membranes of the cell are selectively permeable

• Only certain membranes are constructed from amphipathic molecules

Which of the following factors would tend to increase membrane fluidity?

• a greater proportion of unsaturated phospholipids

• a greater proportion of saturated phospholipids

• a lower temperature

• a relatively high protein content in the membrane

Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because

• they are species specific

• they always lead to the same cellular response

• they amplify the original signal manyfold

• they counter the harmful effects of phosphates

Lipid-soluble signaling molecules, such as aldosterone, cross the membranes of all cells but affect only target cells because

• only target cells retain the appropriate DNA segments

• intracellular receptors are present only in target cells

• only target cels have enzymes that break down aldosterone

• only in target cells in aldosterone able to initiate the phosphorylation cascade that turns genes on

Which of the following process includes all the others?

• osmosis

• diffusion of a solute across a memberane

• passive transport

• transport of an ion down its electrochemical gradient