BMS 127 Ch. 3 Cell Structure and Function

Question 0

Which of the following statements concerning growth and reproduction is NOT true?

a. Growth and reproduction may occur simultaneously in living organisms.
b. A living organism must reproduce to be considered alive.
c. Living things may stop growing and reproducing, yet still be alive.
d. Normally, living organisms have the ability to grow and reproduce themselves.

Answer 0

b.

Question 1

A cell may allow a large or charged chemical to move across the cytoplasmic membrane, down the chemical’s electrical and chemical gradients, in a process called __________.

Answer 1

facilitated diffusion

Question 2

A “9 + 2” arrangement of microtubules is seen in ___________ flagella.

Answer 2

eukayotic

Question 3

Which of the following is most closely associated with diffusion?

a. symports
b. antiports
c. carrier proteins
d. endocytosis

Answer 3

c. carrier proteins

Question 4

Which of the following is NOT associated with prokaryotic organisms?

a. nucleoid
b. glycocalyx
c. cilia
d. circular DNA

Answer 4

cilia

Question 5

Which of the following is NOT a function of a glycocalyx?

a. It forms pseudopodia for faster mobility of an organism.
b. It can protect a bacterial cell from drying out.
c. It hides a bacterial cell from other cells.
d. It allows a bacterium to stick to a host.

Answer 5

a

Question 6

Bacterial flagella are anchored to the cell by a __________.

Answer 6

basal body

Question 7

Which cellular structure is important in classifying a bacterial species as Gram-negative or Gram-positive?

Answer 7

cell wall

Question 8

Gram-positive bacteria

a. have a thick cell wall, which retains crystal violet dye
b. contain teichoic acids in their cell wall
c. appear purple after Gram staining
d. all of the above

Answer 8

d

Question 9

What are endospores?

Answer 9

dormant, resistant cells

Question 10

Dipicolinic acid is an important part of __________.

Answer 10

endospores

Question 11

What is a glycocalyx?

Answer 11

A sticky “sugar cup” composed of polysaccharides and polypeptides surrounding the bacteria

Question 12

What is a flagella?

Answer 12

A long, whip-like tail made of tubulin (eukaryotes) or flagellin (prokaryotes).

Question 13

What is the function of axial filaments?

Answer 13

Responsible for motility of spirochetes

Question 14

What is cilia made of in eukaryotes?

Answer 14

tubulin

Question 15

What are fimbrae?

Answer 15

Short, numerous, bristle-like projections found in quantities of 100 or more.

Question 16

What is a pili?

Answer 16

A cellular extension used for bacterial conjugation.