During which stage do homologous chromosomes move away from each other? A.Metaphase I B.Prophase C.Anaphase I

Question

Question 1 of 30 3.33/ 3.33 Points

This figure shows the cell cycle. What does “D” represent?

A.Cytokinesis

B.M

C.G2

D.G1

E.Mitosis

Question 2 of 30 3.33/ 3.33 Points

During which stage do homologous chromosomes move away from each other?

A.Metaphase I

B.Prophase

C.Anaphase I

D.Metaphase II

E.Anaphase II

Question 3 of 30 3.33/ 3.33 Points

In the cell cycle the “S” stands for:

A.Sister

B.Synapsis

C.Synthesis

D.Somatic

E.Sexual

Question 4 of 30 3.33/ 3.33 Points

In plants, cytokinesis occurs with the formation of:

A.A cleavage furrow in the cell wall

B.A cleavage furrow in the nuclear membrane

C.Asters and centrioles

D. A cell plate

E.A cleavage furrow in the cytoplasm

Question 5 of 30 0.0/ 3.33 Points

Molecules which stimulate or inhibit cell division are referred to as:

A.Checkpoint molecules

B.Contact molecules

C.Signaling molecules

D.Control molecules

E.Transduction molecules

Question 6 of 30 0.0/ 3.33 Points

If you were a biologist studying how an RNA virus such as HIV can attack and infect a human cell which contains DNA, you would be studying which of the following enzymes?

A.RNA transcriptase

B.Reverse transcriptase

C.DNA transcriptase

D.DNA polymerase

E.RNA polymerase

Question 7 of 30 0.0/ 3.33 Points

Based on the work of Thomas Cech and Sidney Altman, why is RNA thought to have been the first type of genetic material?

A.RNA is made of nucleotides.

B.RNA is single stranded and more simple than DNA.

C.RNA contains uracil which was abundant in the early atmosphere.

D.RNA can be both a substrate and an enzyme.

E.RNA can be converted into DNA.

Question 8 of 30 0.0/ 3.33 Points

If you were studying different diseases which are caused by viruses, which of the following would you not be interested in studying?

A.Polio

B.AIDS

C.Smallpox

D.Cervical cancer

E.Chlamydia

Question 9 of 30 3.33/ 3.33 Points

If you were studying archaea which are found in an anaerobic environment such as the mud found in swamps, you would be studying which of the following?

A.Methanogens

B.Halophiles

C.Thermoacidophiles

D.Cyanophiles

E.Lichens

Question 10 of 30 3.33/ 3.33 Points

When a bacteriophage carries portions of bacterial DNA from one cell to another, this is known as

A.endospore formation.

B.binary fission.

C.transduction.

D.conjugation.

E.transformation.

Question 11 of 30 0.0/ 3.33 Points

Which of the following is characterized by chloroplasts containing pyrenoids?

A.Giardia

B.Euglena

C.Amoeb a

D.Trichomonas

E.Trypanosoma

Question 12 of 30 0.0/ 3.33 Points

A biologist is studying a multinucleated, cytoplasmic mass of cells which creeps along, phagocytiizing plant material as it moves. Based on this information you would conclude that he or she is studying which of the following?

A.Radiolarians

B.Water molds

C.Plasmodial slime molds

D.Amoeboids

E.Cellular slime molds

Question 13 of 30 0.0/ 3.33 Points

Which of the following terms would not be associated with the trypanosomes?

A.Heterotrophic

B.Unicellular

C.Autotrophic

D.Parasite

E.Flagella

Question 14 of 30 3.33/ 3.33 Points

A biologist is studying protists that have a calcium carbonate shell with holes so pseudopods can extend outward. Based on this information you would conclude that he or she is studying which of the following?

A.Radiolarians

B.Diatoms

C.Foraminiferans

D.Apicomplexans

E.Amoeboids

Question 15 of 30 3.33/ 3.33 Points

Which of the following is a sexually transmitted disease?

A.Giardia

B.Euglena

C.Trypanosoma

D.Paramecium

E.Trichchomonas

Question 16 of 30 3.33/ 3.33 Points

This figure shows the alternation of generations. What does “a” represent?

A.Haploid

B.Sporophyte

C.Meiosis

D.Fertilization

E.Mitosis

Question 17 of 30 3.33/ 3.33 Points

Why do some plants feed on insects and other small animals?

A.To obtain water

B.To obtain glucose

C.To obtain carbohydrates

D.To obtain oxygen

E.To obtain nitrogen

Question 18 of 30 3.33/ 3.33 Points

Sphagnum is a type of ________ that has nonliving cells that can absorb moisture and can be used in gardening.

A.angiosperm

B.algae

C.moss

D.fern

E.gymnosperm

Question 19 of 30 3.33/ 3.33 Points

Which part of the seed provides nourishment for the embryo?

A.The endosperm

B.The egg sac

C.The seed coat

D.The anther

E.The ovary

Question 20 of 30 3.33/ 3.33 Points

In the moss life cycle, the ______ generation is dominant.

A.Diploid gametophyte

B.Haploid gametophyte

C.Diploid sporophyte

D.Triploid sporophyte

E.Haploid sporophyte

Question 21 of 30 3.33/ 3.33 Points

Calculating the mitotic index gives a quantitative description of which of the following?

A.The percentage of cells undergoing cytokinesis

B.The percentage of cells in prophase

C.The percentage of cells in interphase (i.e., resting phase)

D.The percentage of dividing cells

Question 22 of 30 0.0/ 3.33 Points

To calculate the mitotic index, you

A.add up the number of cells in prophase, metaphase, anaphase and telophase and divide that number by the total number of cells. Then multiply by 100.

B.add up the number of cells in interphase and divide by the number of cells in all the other phases of the cell cycle

C.subtract the number of cells in the phases of mitosis from the number in interphase and multiply by 100

D.calculate the ration of cell in metaphase to those in prophase and then multiply by 100

Question 23 of 30 0.0/ 3.33 Points

Which of the following does not occur during interphase?

A.DNA replication

B.DNA synthesis

C.Cell division

D.None of the above

Question 24 of 30 0.0/ 3.33 Points

Which of the following does not occur during interphase?

A.DNA is duplicated

B.Cell is growing

C.Chromosomes are visible

D.Organelles and cell parts are made

Question 25 of 30 0.0/ 3.33 Points

In mitosis the nuclear membrane disappears in ________ and reappears in ___________.

A.Metaphase, prophase

B.Telophase, anaphase

C.Anaphase, metaphase

D.Prophase, telophase

Question 26 of 30 0.0/ 3.33 Points

For both normal and cancerous tissue the most prevalent phase of the cell cycle was:

A.Interphase

B.Telophase

C.Prophase

D.Metaphase

Question 27 of 30 3.33/ 3.33 Points

Cancerous cells are said to have a cell cycle that is “deregulated,” or different than a normal cell cycle. What is the most evident sign of this deregulation?

A.Cancerous cells divide more slowly than normal cells

B.Cancerous cells spend more time in interphase

C.Cancerous cells divide at the same rate as normal cells

D.Cancerous cells divide more often