LFS100 Quiz 2

Question 1

How do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in G1 of the cell cycle?

Answer 1

The daughter cells have the same number of chromosomes and the same amount of DNA.

Question 2

A particular cell has half as much DNA as some of the other cells in a mitotically active tissue. The cell in question is most likely in

Answer 2

G1.

Question 3

The MPF protein complex turns itself off by

Answer 3

activating a process that destroys cyclin.

Question 4

The primary animal tissue associated with covering and lining is

Answer 4

epithelial

Question 5

The tissue that always has a free surface exposed to the internal or external environment is

Answer 5

epithelial tissue.

Question 6

Cartilage heals poorly and in many instances does not heal or recover at all after a severe injury, because cartilage is

Answer 6

avascular

Question 7

Smooth muscle is an involuntary muscle tissue.

Answer 7

True

Question 8

The numerous cellular extensions which branch off the neuronal cell body are termed?

Answer 8

dendrites

Question 9

_______are mature cells without protoplasts with thick, lignified secondary walls that may or may not function in transport

Answer 9

sclerenchyma

Question 10

The best word to describe the growth of plants in general is

Answer 10

indeterminate

Question 11

If you started with a fertilized egg (zygote) and allow it to undergo five cycles of mitotic division how many cells would you have?

Answer 11

20

Question 12

After telophase I of meiosis, the chromosomal makeup of each daughter cell is

Answer 12

haploid, and the chromosomes are composed of two chromatids.

Question 13

Epithelial cells exhibit modifications that adapt them for

Answer 13

secretion.

Question 14

Cells that remove damaged cells or pathogens from connective tissue are

Answer 14

macrophages.

Question 15

Which two junctions are found in the intercalated disc of cardiac muscle tissue?

Answer 15

gap junctions and desmososmes

Question 16

What type of cells is modified to transmit signals from one place to another?

Answer 16

neurons

Question 17

The fibre cells of plants are a type of

Answer 17

sclerenchyma.

Question 18

________ provides cells for primary growth.

Answer 18

Apical meristems

Question 19

Which of the following is the main component of phloem sap?

Answer 19

sucrose

Question 20

The centromere is a region in which

Answer 20

chromatids are attached to one another.

Question 21

Which of the following statements is not true?

Answer 21

Mitosis may occur without cytokinesis.

Question 22

If mammalian cells receive a go-ahead signal at the G1 checkpoint, they will

Answer 22

complete the cycle and divide.

Question 23

Which of the following is TRUE of the process of meiosis?

Answer 23

Four haploid cells result.

Question 24

Each of the following is a primary tissue type, except

Answer 24

osseous tissue.

Question 25

Stratified cuboidal epithelia would be found

Answer 25

lining the ducts that drain sweat glands.

Question 26

Chondrocytes are to cartilage as osteocytes are to

Answer 26

bone.

Question 27

Which two junctions are found in the intercalated disc of cardiac muscle tissue?

Answer 27

gap junctions and desmososmes

Question 28

The myelin sheath in the peripheral nervous system is produced by the

Answer 28

Schwann cells

Question 29

Land plants are composed of all the following tissue types except

Answer 29

mesodermal.

Question 30

Pores on the leaf surface that function in gas exchange are called

Answer 30

stomata.

Question 31

Additional vascular tissue produced as secondary growth in a stem originates from which cells?

Answer 31

vascular cambium

Question 32

Your laboratory partner has an open beaker of pure water. By definition, the water potential (Ψ) of this water is

Answer 32

zero.

Question 33

Which of the following is the main component of phloem sap?

Answer 33

sucrose

Question 34

The centromere is the site of spindle microtubule attachment during mitosis.

Answer 34

False

Question 35

If cells in the process of dividing are subjected to colchicine, a drug that interferes with the functioning of the spindle apparatus, at which stage will mitosis be arrested?

Answer 35

metaphase

Question 36

Bacterial cells divide by

Answer 36

binary fission

Question 37

Cells that are in a nondividing state are in which phase?

Answer 37

G0

Question 38

When comparing prophase I of meiosis with prophase of mitosis, which of the following occurs only in meiosis?

Answer 38

Tetrads form

Question 39

Glands that secrete hormones into the blood or tissue fluids are

Answer 39

endocrine glands.

Question 40

You would find pseudostratified columnar epithelium lining the

Answer 40

trachea.

Question 41

The fibrous components of connective tissue are produced by

Answer 41

fibroblasts.

Question 42

Intercalated discs are characteristic of

Answer 42

cardiac muscle tissue.

Question 43

The numerous cellular extensions which branch off the neuronal cell body are termed?

Answer 43

dendrites

Question 44

________ provides cells for secondary growth.

Answer 44

Vascular cambium

Question 45

Assume that a particular chemical interferes with the establishment and maintenance of proton gradients across the membranes of plant cells. All of the following processes would be directly affected by this chemical except

Answer 45

xylem transport.

Question 46

Cytokinesis is division of the

Answer 46

cytoplasm

Question 47

A particular cell has half as much DNA as some of the other cells in a mitotically active tissue. The cell in question is most likely in

Answer 47

G1.

Question 48

The MPF protein complex turns itself off by

Answer 48

activating a process that destroys cyclin.

Question 49

Which of the following is TRUE of the process of meiosis?

Answer 49

Four haploid cells result.

Question 50

The only example of unicellular exocrine glands are

Answer 50

goblet cells.

Question 51

A transitional epithelium would be found

Answer 51

lining the urinary bladder.

Question 52

The watery ground substance of blood is called

Answer 52

plasma

Question 53

Intercalated discs are characteristic of

Answer 53

cardiac muscle tissue.

Question 54

The myelin sheath in the peripheral nervous system is produced by the

Answer 54

Schwann cells

Question 55

Which structure is correctly paired with its tissue system?

Answer 55

tracheid - vascular tissue

Question 56

Which of the following are water-conducting cells that are dead at functional maturity?

Answer 56

tracheids and vessel elements

Question 57

The vascular system of a three-year-old eudicot stem consists of

Answer 57

3 rings of xylem and 1 of phloem.

Question 58

If ΨP = 0.3 MPa and ΨS = -0.45 MPa, the resulting Ψ is

Answer 58

-0.15 MPa.

Question 59

All of the following normally enter the plant through the roots except

Answer 59

carbon dioxide.