BIOLOGY

Question 10 of 10             1.0/ 1.0 Points

 

Teeth can have a biofilm formed on the surface. Cell signaling will

 

 

 

A.increase cell quantity

 

 

 

B.cause increase saliva production

 

 

 

C.cause apoptosis

 

 

 

D.cause uncontrolled cell division

 

 

 

 

 

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Chapter 10- wk 7

 

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Part 1 of 1 –         9.0/ 10.0 Points

 

 

 

Question 1 of 10               1.0/ 1.0 Points

 

Which molecule initiates the halt of the cycle when damaged DNA is detected in G1?

 

 

 

A.Rb

 

 

 

B.p53

 

 

 

C.Cdk/cyclin complex

 

 

 

D.p21

 

 

 

E.E2F

 

 

 

 

 

Question 2 of 10               0.5/ 1.0 Points

 

In which type of human cell(s) would 46 chromosomes be located? Select all that apply.

 

 

 

A. diploid

 

 

 

B. egg

 

 

 

C. somatic

 

 

 

D. gamete

 

 

 

E. sperm

 

 

 

F. haploid

 

 

 

 

 

 

 

Question 3 of 10               1.0/ 1.0 Points

 

If there are 8 centromeres in metaphase, how many centromeres will be present in anaphase?

 

 

 

A.4

 

 

 

B.8

 

 

 

C.16

 

 

 

D.32

 

 

 

 

 

Question 4 of 10               1.0/ 1.0 Points

 

A large cell will be initiated to divide because

 

 

 

A.a decrease in surface-to-volume ratio

 

 

 

B.an increase in surface-to-volume ratio

 

 

 

C.crowding from smaller cells

 

 

 

D.large cells do not experience quiescent stage

 

 

 

E.large cells use more nutrients than small cells

 

 

 

Question 5 of 10               0.5/ 1.0 Points

 

Damaged DNA can potentially be repaired during which checkpoint. Select all that apply.

 

 

 

A. G1

 

B. S

 

 

 

C. G2

 

 

 

D. G0

 

E. M

 

 

 

 

 

Question 6 of 10               1.0/ 1.0 Points

 

Place the order of events in chromosome packaging from beginning to end.

 

 

 

A.DNA double helix, nucleosome, sister chromatids, chromatin

 

 

 

B.Chromatin, nucleosomes, DNA double helix, sister chromatids

 

 

 

C.DNA double helix, chromatin, nucleosomes, sister chromatids

 

 

 

D.sister chromatids, DNA double helix, chromatin, nucleosome

 

 

 

 

 

Question 7 of 10               1.0/ 1.0 Points

 

In nature, there is an exception to every rule. Of the species below, which one has a very unusual genome that violates the “rule”?

 

 

 

A.Borrelia burgdorferi, the bacterium responsible for Lyme disease, has a linear genome and up to 21 plasmids.

 

B.E. coli, a common bacterium in the human intestine, has DNA nucleotides A, T, C, and G, with only one OH group on the sugar moiety.

 

C.Humans have a genome formed from 23 pairs of linear chromosomes, each of which is so long that it must be wrapped up and condensed into a special structure to fit in the nucleus.

 

D.Arabidopsis pollen is haploid, carrying only one copy each of five linear chromosomes.

 

 

 

Question 8 of 10               1.0/ 1.0 Points

 

When the p53 gene is damaged, which event may happen?

 

 

 

A.Cells can divide uncontrollobly

 

 

 

B.Cells will fix the DNA pass the G1 checkpoint

 

C.Cells will pass the G2 checkpoint

 

 

 

D.Cells will always undergo apoptosis

 

 

 

 

 

 

 

 

 

 

 

Question 9 of 10               1.0/ 1.0 Points

 

A cell’s entire amount of hereditary information is the

 

 

 

A.nucleoid

 

 

 

B.nucleus

 

 

 

C.genome

 

 

 

D.DNA

 

 

 

 

 

Question 10 of 10             1.0/ 1.0 Points

 

If a researcher looks at a cell and notices a straight line of sister chromatids, which phase are they viewing?

 

 

 

A.interphase

 

 

 

B.prophase

 

 

 

C.prometaphase

 

 

 

D.metaphase

 

 

 

E.anaphase

 

 

 

F.telophase

 

 

 

 

 

 

 

Chapter 11- wk 7

 

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Part 1 of 1 –         5.75/ 10.0 Points

 

 

 

Question 1 of 10               1.0/ 1.0 Points

 

What is an advantage of asexual reproduction? Select all that apply.

 

 

 

A. it occurs quickly

 

 

 

B. populates areas rapidly

 

 

 

C. all organizms are clones

 

 

 

D. high genetic diversity

 

 

 

E. only need one parent

 

 

 

 

 

Question 2 of 10               0.0/ 1.0 Points

 

An organism has 36 chromosomes. At the end of meiosis I, each gamete contains

 

 

 

A.26 chromosomes, 36 chromatids

 

 

 

B.36 chromosomes, 72 chromtids

 

 

 

C.18 chromosomes, 36 chromatids

 

 

 

D.18 chromosomes, 18 chromatids

 

 

 

Question 3 of 10               1.0/ 1.0 Points

 

Which is important in stabilization of homolog pairing and formation of crossover in meiotic prophase?

 

 

 

A.A

 

 

 

B.B

 

 

 

C.C

 

 

 

D.D

 

 

 

E.E

 

 

 

 

 

Question 4 of 10               1.0/ 1.0 Points

 

Meiosis and sexual reproduction increase diversity because

 

 

 

A.they are archaic processes

 

 

 

B.it allows for populations to adapt to environmental changes

 

 

 

C.they only need one parent

 

 

 

D.they will almost always have different offspring arise

 

 

 

E.they produce offspring extremely quickly

 

 

 

Question 5 of 10               0.75/ 1.0 Points

 

Which event is similar between prophase I and prophase? Select all that apply.

 

 

 

A. The nuclear membrane begins to disintegrate

 

 

 

B. Spindle fibers appear

 

 

 

C. Each chromosome is composed of two chromatids

 

 

 

D. Chromosomes condense

 

 

 

E. Each chromosome has potentially experienced crossover

 

 

 

F. Tetrads are present

 

 

 

 

 

Question 6 of 10               1.0/ 1.0 Points

 

A large family has a history of multiple aneuploid diseases such as Down Syndrome, trisomy-18 and Klinefelter Syndrome (XXY). The propensity to defects seems to be inherited, but the gene responsible is unknown.

 

What types of candidate genes would be most likely to lead to aneuploidy if they were mutated?

 

 

 

A.Genes that are part of the G1 checkpoint of mitosis.

 

 

 

B.Genes that encode proteins involved in chiasma formation.

 

 

 

C.Histone genes.

 

 

 

D.Genes that control DNA synthesis.

 

 

 

Question 7 of 10               0.0/ 1.0 Points

 

A nuclear envelope does not usually form around each set of chromosomes in the haploid daughter cells in _________.

 

 

 

A.interphase

 

 

 

B.prophase I

 

 

 

C.metaphase I

 

 

 

D.anaphase I

 

 

 

E.telophase I

 

 

 

F.prophase II

 

 

 

G.metaphase II

 

H.anaphase II

 

 

 

I.telophase II

 

 

 

J.cytokinesis

 

 

 

 

 

Question 8 of 10               0.0/ 1.0 Points

 

Which structure is separated by microtubules resulting in sister chromatids?

 

 

 

 

 

A.A

 

 

 

B.B

 

 

 

C.C

 

 

 

D.D

 

 

 

Question 9 of 10               1.0/ 1.0 Points

 

Which describes the relationship between gametes and spores?

 

 

 

A.gametes can fuse to become a zygote, but spores can develop into organisms without forming a zygote

 

B.gametes, not spores, can only contribute to genetic diversity in populations

 

 

 

C.gametes are always haploid and spores are always diploid

 

 

 

D.gametes come directly from sporophytes to develop into gametophytes

 

 

 

 

 

 

 

 

 

Question 10 of 10             0.0/ 1.0 Points

 

How does metaphase in meiosis I and meiosis II differ?

 

 

 

A.Sister chromatids are on the metaphase plate in meiosis I and tetrads are on the metaphase plate in meiosis II.

 

B.Homologous chromosomes line up in meiosis I and duplicated chromosomes line up in meiosis II.

 

C.All chromatids are the exact same in meiosis I and differ in meiosis II due to independent assortment

 

D.The ploidy level remains the same in meiosis I but will be reduced in meiosis II.

 

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