Ch. 3 Flashcards

1
Q

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.

A

rough ER and Golgi apparatus.

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2
Q

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

A

U A C G G C.

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3
Q

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

A

crenated (shrink)

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4
Q

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

A

lyzed

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5
Q

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

A

cell cycle

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6
Q

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

A

chromosome

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7
Q

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

A

isotonic solution

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8
Q

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

A

centromere

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9
Q

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”?

A

directs cellular activities, contains DNA

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10
Q

Active transport…

A

requires ATP

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11
Q

Endoplasmic reticulum with ribosomes attached to it is called

A

rough ER

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12
Q

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”?

A

major site of ATP synthesis when oxygen is available

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13
Q

Chromosome pairs are called

A

homologous pairs

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14
Q

Nuecleoli

A

produce ribosomal subunits

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15
Q

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”?

A

contains digestive enzymes

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16
Q

Messenger RNA

A

is synthesized when a portion of a DNA molecule is transcribed

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17
Q

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

A

hypotonic solution

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18
Q

A protein that is converted to an active enzyme is

A

proenzyme

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19
Q

DNA synthesis occurs during

A

the S phase of interphase

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20
Q

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

A

proteosomes

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21
Q

A cell can meet increased energy demands by an increase in

A

the number of mitochondria

22
Q

Absence of a cytoskeleton might affect

A

cell shape

23
Q

Down Syndrome is an example of an aneuploidy called

A

trisomy 21

24
Q

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

A

chromatid N/A

25
Q

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

A

number of carriers in the membrane

26
Q

In prophase

A

the chromosomes condense, shorten and thicken

27
Q

Cytoplasm is found

A

outside the nucleus but inside the plasma membrane

28
Q

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”

A

site of protein synthesis N/A

29
Q

Membrane-bound receptors

A

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

30
Q

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

A

all of the above

31
Q

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

A

facilitated diffusion

32
Q

Organelles

A

vary in number and type depending on cell function

33
Q

A cell uses centrioles in the process

A

cell division

34
Q

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

A

promoter

35
Q

Glycolipids

A

carbohydrates

36
Q

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

A

hypertonic to the cell

37
Q

Cell dispose of worn-out organelles by a process called

A

autophagy

38
Q

Chromosomes that are NOT associated with sex determination are known as

A

autosomes

39
Q

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

A

karyotype

40
Q

Genes on the X chromosomes are

A

X-linked

41
Q

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

A

46; 23

42
Q

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”?

A

outer boundary of cell, controls entry and exit of substances

43
Q

In _______, ions or molecules move in opposite directions.

A

antiport

44
Q

Endocytosis

A

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

45
Q

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

A

chromatin N/A

46
Q

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

A

hypertonic solution

47
Q

Microtubules

A

provide structure and support of the cytoplasm

48
Q

Membrane protein that extends into the lipid bilayer are called

A

integral proteins

49
Q

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

A

chromatin

50
Q

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

A

metaphase