RAHS AP Bio Cell Structure and Function #1

Which statement is correct about diffusion?

• It's very rapid over long distances.
• It's a passive process which molecules move from a region of higher to lower concentration.
• It requires an energy expenditure by the cell.
• It's an active process where molecules move from a region of lower to higher concentration.

Endoplasmic Reticulum:/ER

• The smallest organelle with a huge job / Makes proteins, which are the building blocks of the body.
  
• A folded membrane that moves materials around inside cells / Also acts as the site of manufacturing materials needed by the cell.
  
• A small sack that stores water and food until the cell needs it /  Stores waste temporarily until the cell  gets rid of it.
  
• The protective outer layer that controls what enters and leaves the cell.
  

Tags

NGSS.MS-LS1-2

Prokaryotic cell

• a cell that lacks a nucleus and other membrane bound organelles; includes achaea and bacteria
• a cell containing a nucleus and other membrane bound organelles
• the idea that the mitochonria and chloroplasts were once free living and were engulfed by other prokaryotic cells.
•  part of the cell containing DNA and RNA and responsible for growth and reproduction

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

Eukaryotic Cell

• a cell containing a nucleus and other membrane bound organelles
• a cell that lacks a nucleus and other membrane bound organelles; includes achaea and bacteria
• the idea that the mitochonria and chloroplasts were once free living and were engulfed by other prokaryotic cells.
• a part of the cell containing DNA and RNA and responsible for growth and reproduction

Tags

NGSS.MS-LS1-2

What 4 structures are common between plant, animal, and bacterial cells?

• Golgi Apparatus, Chloroplasts, Ribosomes, Nucleus
• Cell Wall, Mitochondria, Cell Membrane, Cytoplasm
• Rough ER, Smooth ER, Nucleus, Ribosomes
• DNA, Cytoplasm, Ribosomes, Cell membrane

In biological membranes, the phospholipids are arranged in a _______, with the_______.

• bilayer; fatty acids pointing toward each other
• bilayer; fatty acids facing outward
• single layer; fatty acids facing the interior of the cell
• single layer; phosphorus-containing region facing the interior of the cell

Which statement about cholesterol molecules is true?

• They help hold a membrane together.
• They alter the fluidity of the membrane.
• They attach to carbohydrates.
• They disrupt membrane function.

If aquaporins are injected into the membranes of epithelial cells that line blood vessels,

• the flow of Na+ through aquaporins will increase
• the intracellular concentration of K+ will increase
• the membranes will become more permeable to water
• the electrical properties of the cells will be altered

A saltwater snail is placed in freshwater. What happens to its cells?

• They shrink
• They swell
• Nothing happens

Tags

NGSS.HS-LS1-3

When cells are placed in a __________ solution they begin to swell.

• Hypertonic
• Isotonic
• Hypotonic
• Equalized

Tags

NGSS.HS-LS1-3