chapter 3

Question 1

plasma membrane structure

Answer 1

2 layers of phospholipids embedded with INTEGRAL and PERIPHERAL proteins. The phospholipid tails are hydrophobic

Question 2

plasma membrane function

Answer 2

provides a boundary around the cell; acts as a place for chemical reactions to occur. It is selectively permeable.

Question 3

nucleus structure

Answer 3

the dna is surrounded and protected by a nuclear envelope (a membrane). the nuclear envelope has pores.

Question 4

nucleus function

Answer 4

the nucleus is part of a cell that houses the dna

Question 5

cytoplasm structure

Answer 5

the semi-fluid medium (jelly-like substance)

Question 6

cytoplasm function

Answer 6

hold the organelles in place inside a cell; provide a site for chemical reactions to occur.

Question 7

organelles

Answer 7

small organs found within a cell. their job is to perform a specific function for the cell.

Question 8

ribosomes

Answer 8

make proteins

Question 9

rough er

Answer 9

synthesizes proteins; the surface is studded with ribosomes

Question 10

smooth er

Answer 10

synthesizes lipids; it lacks ribosome son its surface