LFS100 Quiz 2 Flashcards
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?
The daughter cells have the same number of chromosomes and the same amount of DNA.
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
G1.
The MPF protein complex turns itself off by
activating a process that destroys cyclin.
The primary animal tissue associated with covering and lining is
epithelial
The tissue that always has a free surface exposed to the internal or external environment is
epithelial tissue.
Cartilage heals poorly and in many instances does not heal or recover at all after a severe injury, because cartilage is
avascular
Smooth muscle is an involuntary muscle tissue.
True
The numerous cellular extensions which branch off the neuronal cell body are termed?
dendrites
_______are mature cells without protoplasts with thick, lignified secondary walls that may or may not function in transport
sclerenchyma
The best word to describe the growth of plants in general is
indeterminate
If you started with a fertilized egg (zygote) and allow it to undergo five cycles of mitotic division how many cells would you have?
20
After telophase I of meiosis, the chromosomal makeup of each daughter cell is
haploid, and the chromosomes are composed of two chromatids.
Epithelial cells exhibit modifications that adapt them for
secretion.
Cells that remove damaged cells or pathogens from connective tissue are
macrophages.
Which two junctions are found in the intercalated disc of cardiac muscle tissue?
gap junctions and desmososmes
What type of cells is modified to transmit signals from one place to another?
neurons
The fibre cells of plants are a type of
sclerenchyma.
________ provides cells for primary growth.
Apical meristems
Which of the following is the main component of phloem sap?
sucrose
The centromere is a region in which
chromatids are attached to one another.
Which of the following statements is not true?
Mitosis may occur without cytokinesis.
If mammalian cells receive a go-ahead signal at the G1 checkpoint, they will
complete the cycle and divide.
Which of the following is TRUE of the process of meiosis?
Four haploid cells result.