Ch. 3

Question 1

A cell that produces many proteins for secretion would have large numbers of:
a. rough ER and Golgi apparatus.
b. lysosomes and Golgi apparatus.
c. Golgi apparatus and microvilli.
d. ribosomes and centrioles.
e. mitochondria and cilia.

Answer 1

rough ER and Golgi apparatus.

Question 2

A DNA base sequence is ATGCCG. The sequence of bases in a strand of mRNA transcribed from this sequence of bases in DNA would be:
a. T A C G G C.
b. U T C G G U.
c. U A C G G C.
d. A U G C C G.
e. T A G G G G

Answer 2

U A C G G C.

Question 3

Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is the condition of the RBC in solution “B”:
a. hypotonic solution
b. hypertonic solution
c. isotonic solution
d. hemolyzed
e. crenated

Answer 3

crenated (shrink)

Question 4

Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is the condition of the RBC in solution “C”?
a. hypotonic solution
b. hypertonic solution
c. isotonic solution
d. lyzed
e. crenated

Answer 4

lyzed

Question 5

Cells undergo a series of changes during their life-span which is known as
a. cell division
b. DNA inforation
c. cell cycle
d. growth phase

Answer 5

cell cycle

Question 6

Answer these questions about chromosome structure. What does “A” represent?
a. chromatid
b. proteins
c. chromosomes
d. centromere
e. chromatin

Answer 6

chromosome

Question 7

Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution “A” relative to the RBC?
a. hypotonic solution
b. hypertonic solution
c. isotonic solution
d. hemolyzed
e. crenated

Answer 7

isotonic solution

Question 8

Answer these questions about chromosome structure. What does “C” repressent?
a. chromatid
b. proteins
c. chromosomes
d. centromere
e. chromatin

Answer 8

centromere

Question 9

The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of “D”?

Answer 9

directs cellular activities, contains DNA

Question 10

Active transport…

Answer 10

requires ATP

Question 11

Endoplasmic reticulum with ribosomes attached to it is called

Answer 11

rough ER

Question 12

The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of “B”?

Answer 12

major site of ATP synthesis when oxygen is available

Question 13

Chromosome pairs are called

Answer 13

homologous pairs

Question 14

Nuecleoli

Answer 14

produce ribosomal subunits

Question 15

The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of “E”?

Answer 15

contains digestive enzymes

Question 16

Messenger RNA

Answer 16

is synthesized when a portion of a DNA molecule is transcribed

Question 17

Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution “C” relative to the RBC?

Answer 17

hypotonic solution

Question 18

A protein that is converted to an active enzyme is

Answer 18

proenzyme

Question 19

DNA synthesis occurs during

Answer 19

the S phase of interphase

Question 20

A cell that breaks down and recycles proteins would have a large numbers

Answer 20

proteosomes

Question 21

A cell can meet increased energy demands by an increase in

Answer 21

the number of mitochondria

Question 22

Absence of a cytoskeleton might affect

Answer 22

cell shape

Question 23

Down Syndrome is an example of an aneuploidy called

Answer 23

trisomy 21

Question 24

answer these questions about chromosome structure. “What does “D” represent

Answer 24

chromatid N/A

Question 25

In simple diffusion, the rate at which a solute passes through a membrane depends on all of the following EXCEPT the

Answer 25

number of carriers in the membrane

Question 26

In prophase

Answer 26

the chromosomes condense, shorten and thicken

Question 27

Cytoplasm is found

Answer 27

outside the nucleus but inside the plasma membrane

Question 28

The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "C"

Answer 28

site of protein synthesis N/A

Question 29

Membrane-bound receptors

Answer 29

have their receptors sites on the outer surface of the plasma membrane

Question 30

Mitochondria: a. contains DNA. have inner and outer membranes. b. have inner folds called cristae. c. are the cell's power plants. d. all of the above

Answer 30

all of the above

Question 31

A particular membrane transport process exhibits saturation, uses carrier molecules, but does NOT require ATP. The process is probably

Answer 31

facilitated diffusion

Question 32

Organelles

Answer 32

vary in number and type depending on cell function

Question 33

A cell uses centrioles in the process

Answer 33

cell division

Question 34

A DNA nucleotides sequences that signals the beginning of a gene is called a

Answer 34

promoter

Question 35

Glycolipids

Answer 35

carbohydrates

Question 36

0.9% NaCl solution (saline) is isotonic to a cell, while seawater is

Answer 36

hypertonic to the cell

Question 37

Cell dispose of worn-out organelles by a process called

Answer 37

autophagy

Question 38

Chromosomes that are NOT associated with sex determination are known as

Answer 38

autosomes

Question 39

A display of the chromosomes of a somatic cell during metaphase of mitosis is the

Answer 39

karyotype

Question 40

Genes on the X chromosomes are

Answer 40

X-linked

Question 41

Human somatic cells contain _______ chromosomes, while gametic cells contain _______ chromosomes.

Answer 41

46; 23

Question 42

The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "A"?

Answer 42

outer boundary of cell, controls entry and exit of substances

Question 43

In _______, ions or molecules move in opposite directions.

Answer 43

antiport

Question 44

Endocytosis

Answer 44

is the bulk uptake of material through the plasma membrane by vesicle formation.

Question 45

Answer these questions about chromosome structure. What does "B" represent?

Answer 45

chromatin N/A

Question 46

Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is solution "B" relative to the RBC?

Answer 46

hypertonic solution

Question 47

Microtubules

Answer 47

provide structure and support of the cytoplasm

Question 48

Membrane protein that extends into the lipid bilayer are called

Answer 48

integral proteins

Question 49

Before cell division occurs, DNA in the nucleus is condensed to form

Answer 49

chromatin

Question 50

In which part of the cell cycle do chromosomes align along the equator?

Answer 50

metaphase