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dna replication and cell division

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Quiz on dna replication and cell division, created by michelle_simms_w on 13/05/2014.
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Quiz by michelle_simms_w, updated more than 1 year ago
michelle_simms_w
Created by michelle_simms_w over 11 years ago
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Resource summary

Question 1

Question
DNA is associates itself around protein histones bundles called nucleosomes. Which function as...
Answer
  • support
  • extra genetic information
  • for stablity

Question 2

Question
Guanie and cytosine have 2 bonds
Answer
  • True
  • False

Question 3

Question
Orgin of replication is where there the DNA strand are cut up into segments and begin repeating themseleves
Answer
  • True
  • False

Question 4

Question
Why are there multiple sites of origin on a strand of DNA
Answer
  • Genetic malfunction
  • It allows the DNA to be replicated as fast as possible
  • There are different enzymes require fore each of the bubbles

Question 5

Question
Replication proceeds in one direction from each origin, until the entire molecule is copied
Answer
  • True
  • False

Question 6

Question
Which way does DNA only flow
Answer
  • 3' to 5'
  • 5' to 3'

Question 7

Question
What are the given names for the template and its new strand
Answer
  • Mother and daughter strand
  • Parent and Daughter strand
  • Father and son strand
  • Orginal and twin strand

Question 8

Question
3' to 5' direction of replication is made bit by bit
Image:
Image176.gif (image/gif)
Answer
  • True
  • False

Question 9

Question
Single strand binding protiens allow DNA to wind back up on itself during replication
Answer
  • True
  • False

Question 10

Question
What is the ratio for rate of of elongation between bacteria and human cells is.. nucleotides per second
Answer
  • 350: 35
  • 6000:600
  • 500:50

Question 11

Question
At which position does DNA replication begin
Answer
  • the left side of the bubble
  • the middle of the bubble
  • the right of the bubble

Question 12

Question
Lagging strand flow in the oppostie direction from the point origin towards the replication fork.
Answer
  • True
  • False

Question 13

Question
What is the name of the model DNA replication follows
Answer
  • Conservative
  • Semiconservative
  • Dispersive

Question 14

Question
If DNA is replicated disperively , and you did the same type of 15N/14N bacterial experiment, what type of band pattern would you see after the density spin
Answer
  • the same pattern as Meselson and stahl
  • the first generation tube will have 14N and 15N bands; the second generation will also have bands but the 14N band would be darker
  • The 1st generation tube will have one intermediate band; the second generation tube will have 1 intermediate band and another slightly higher
  • instead of bands, the first generation and second generation tubes will have a smear between 14N and 15N positions

Question 15

Question
What imporant function doe DNA polymerase do
Answer
  • synthesizes new DNA
  • Proof reads the newly made DNA
  • removes RNA Primer

Question 16

Question
state which of the following features that multicellular organisms don't require cell division
Answer
  • Developement from a fertilized cell
  • Destorying mutated DNA
  • Growth
  • Repair

Question 17

Question
All the DNA in a cell constitutes is called a
Answer
  • Genus
  • somatic cells
  • genome

Question 18

Question
Forming chromosomes DNA strands condense along histones bundle to form a chromatid, two are duplicated in the in the nucleus through DNA replication and a pinched together 2/3s of the was up this is called the centrmere. They are known as sister chromatids which are when separated 2 new chromosomes.
Answer
  • True
  • False

Question 19

Question
In Mitosis there are 3 major phases
Answer
  • True
  • False

Question 20

Question
which percentage of time is spent where
Answer
  • Interphase 30% Mitosis phase 70%
  • Interphase 90% Mitosis phase 10%
  • Interphase 50 % Mitosis phase 50%
  • Interphase 10% Mitosis phase 90%

Question 21

Question
what happens in the interphase section mitosis
Answer
  • G1- the cell grows
  • G2- grows more as it completes preperation for cell division
  • S- the cell continues to grow as it copies its chromosomes
  • E-enzymes in the cell wall break down as cells get ready to split

Question 22

Question
All of the following are included in phases of mitosis Prophase Prometaphase Metaphase Anaphase Telophase Celophase
Answer
  • True
  • False

Question 23

Question
The mitotic spindle is made up of 2 microtubules...... called..... and are duplicated during interphase
Answer
  • Centrioles and centrosme
  • codon and anti codon
  • Fillament and intermediate fillaments

Question 24

Question
During the G2 phase of mitosis a nuclear envelope encloses the nucleus, the centrosomes have been duplicated and chromosome have been duplicated during the S phase however is not yet condensed
Answer
  • True
  • False

Question 25

Question
which of the following does not occur during prophase
Answer
  • Chromatid becomes condensed
  • centrosomes are on opposite sides of the cell and kinetochores are formed between spindles and chromosomes
  • nucleoi disappears
  • centrosomes start to move to opposite sides of the cell and form spindles radial arrays. Shorter spindle called aster appear
  • Each duplicated chromosome appears as two sister chromatids

Question 26

Question
Which of the following are missing from prometaphase Nuclear envelope fragments Chromosmes are now even more condensed Each chromatid have a kinetiochore attached to centromere Nonkinetochore microtubles interact with each other
Answer
  • Microtubels extending from the each centrosome no invade the nuclear area
  • The cell elongates as the nonkinetochore microtubles lenghten
  • A cleavage furrow is formed

Question 27

Question
In metaphase the chromosomes convene at the metaphase plate which are a similar distance from the spindle poles
Answer
  • True
  • False

Question 28

Question
Anaphase is considered the shortest phase what else can be said about this phase
Answer
  • The two daughter cell are liberated and begin moving to opposites of the cell as the kinetochore microtubles shorten as they are draw to the poles at a rate of 1 micrometer per minute
  • By the end of the of the phase these is a complete and equivalent set of chromosomes on either side of the cell
  • chromosomes become less condesed
  • nonkinetochores help the cell elongate

Question 29

Question
During telophase and cytokenisis, 3 daughter nuclei form in the cell, and nuclear envelope is forms around the fragments of the parent cells. The Nucloli doesn't reappear. The chromosomes become less condense and the microtubles are depolymerized. In cytokensis there is a division in the cytoplasm continues as the a cleavage furrow is formed and the cell pinches into two
Answer
  • True
  • False

Question 30

Question
Which of the following phases of mitosis is not include in the division of plant cells
Answer
  • Prophase
  • Prometaphase
  • Metaphase
  • Anaphase
  • Telophase
  • Cytokenisis

Question 31

Question
How are microtubles shortened in anaphase? They are brought back toward the pole via motor proteins which help the microtubles depolymerizes . The protein pulls the filament at the kinetochore as more is pulled though the microtuble is broken up into tublin subunits.
Answer
  • True
  • False

Question 32

Question
how many chromosomes are in a prokaryote
Answer
  • 1
  • 2
  • 5
  • 10

Question 33

Question
like eukaryotes ,prokayotic cells have a a leading and lagging strand are produced
Answer
  • True
  • False

Question 34

Question
What is the name of the type of reproduction carried out by prokaryotes
Answer
  • asexual reproduction
  • Binary fission
  • sexual reproduction

Question 35

Question
which aspects are inolved in binary fission
Answer
  • Replication begins at two origins on the bacterial chromosome
  • There is a division into two daughter cells
  • Replication finishes and the cells enlongate
  • All of them
  • Copies of the chromosome begin to seperate

Question 36

Question
Protists are said to exhibit types of cell division between binary fission an mitosis
Answer
  • True
  • False

Question 37

Question
Once a layer of cells are forms in a dish they will stop growing, however when some cells are removed cell division will continue until the space is filled. This is known as...Density-dependent inhibition
Answer
  • True
  • False

Question 38

Question
Once a layer of cells are forms in a dish they will stop growing, however when some cells are removed cell division will continue until the space is filled. This is known as...Density-dependent inhibition
Answer
  • True
  • False

Question 39

Question
Cancerous cell are not density dependant because they...
Answer
  • Continue to divide well beyond a single layer as as a result forms clumps of cells
  • Don't divide at all and don't produce a layer of cells

Question 40

Question
cells know to stop dividing according to scientists who say that the binding of a cell surface protein to its counterpart on the adjoiinng cells sends a growing inhibiting signal to both cells preventing them from moving forward in the cell cycle or even the presence of growth factors
Answer
  • True
  • False

Question 41

Question
Only some animal cells also exhibit anchorage dependence, in which they must be attached to a solid structure in order to divide. The process is linked back to the use of cytoskelton and proteins in the plasma membrane
Answer
  • True
  • False

Question 42

Question
how many growth factors are currently known in eukayotes
Answer
  • 10
  • 20
  • 50
  • 150

Question 43

Question
growth factor like platelet derived growth factor do what
Answer
  • tell the cells to keep growing
  • give the go ahead when a cell cycle is stopped at check point
  • stimulates further growth

Question 44

Question
Where are the check points in mitosis
Answer
  • S phase
  • G2 phase
  • Mitsosis phase
  • G1 phase

Question 45

Question
A capsid is the protein shell that encloses the viral genome. Capsids are built from protein subunits called capsomeres
Answer
  • True
  • False

Question 46

Question
viruses that infect bacteria are know as
Answer
  • phagocytosis
  • Bacteriophages,

Question 47

Question
Obligate intracellular parasites like viruses can replicate only within a host cell
Answer
  • True
  • False

Question 48

Question
what are prions
Answer
  • virtually indestructible infectious proteins
  • convert normal proteins
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