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Quiz 1

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Question 1 0.87000 out of 0.87000 points

Organized by centrioles, what structures are important in the movement of chromosomes during cell division? Selected Answer:

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spindle fibers

Question 2 0.87000 out of 0.87000 points

What is the name of the membranous structure that compartmentalizes the cytoplasm of eukaryotic organisms? Selected Answer:

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endoplasmic reticulum

Question 3 0.87000 out of 0.87000 points

Living organisms are categorized into two major groups based on the presence or absence of a nucleus. What group is defined by the presence of a nucleus? Selected Answer:

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eukaryotic organism

Question 4 0.87000 out of 0.87000 points

The diploid chromosome number of an organism is usually represented as 2n. Humans have a diploid chromosome number of 46. What would be the expected haploid chromosome number in a human? Selected Answer:

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2 3

Question 5 0.87000 out of 0.87000 points

During interphase of the cell cycle, ________. Selected Answer:

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DNA content essentially doubles

Question 6 0.87000 out of 0.87000 points

If a typical G1 nucleus is 2n and contains 2C (two complements) of DNA, a prophase I cell is 2n and contains 4C of DNA. Selected Answer:

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Tru e

Question 7 0.87000 out of 0.87000 points

S phase is the part of interphase when DNA duplication takes place. Selected Answer:

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Tru e

Question 8 0.87000 out of 0.87000 points

The centromere of a chromosome separates during anaphase. Selected Answer:

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Tru e

Question 9 0.87000 out of 0.87000 points

A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle. Selected Answer:

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Tru e

Question 10 0.87000 out of 0.87000 points

If a typical somatic cell has 64 chromosomes, how many chromosomes are expected in each gamete of that organism? Selected Answer:

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3 2

Question 11 0.87000 out of 0.87000 points

In an organism with 52 chromosomes, how many bivalents would be expected to form during meiosis? Selected Answer:

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2 6

Question 12 0.87000 out of 0.87000 points

For the purposes of this question, assume that a G1 somatic cell nucleus in a female Myrmecia pilosula contains 2 picograms of DNA. How much DNA would be expected in a metaphase I cell of a female? Selected Answer:

4

picograms

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Question 13 0.87000 out of 0.87000 points

An interesting group of ants consists of several virtually identical, closely related species, with females having chromosome numbers of 18, 20, 32, 48, 60, 62, and 64. If one crossed a female of species (A) with 32 chromosomes and a male species (B) with 9 chromosomes (males are haploid, and each gamete contains the n complement), how many chromosomes would one expect in the body (somatic) cells of the female offspring? Selected Answer:

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2 5

Question 14 0.87000 out of 0.87000 points

What is the outcome of synapsis, a significant event in meiosis? Selected Answer:

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side-by-side alignment of homologous chromosomes

Question 15 0.87000 out of 0.87000 points

If a typical G1 nucleus contains 2C (two complements) of DNA, a gamete that is haploid (n) contains 1C of DNA. Selected Answer:

Tru e

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Question 16 0.87000 out of 0.87000 points

During meiosis, chromosome number reduction takes place in anaphase II. Selected Answer:

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Fals e

Question 17 0.87000 out of 0.87000 points

A bivalent at pachytene contains four chromatids. Selected Answer:

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Tru e

Question 18 0.87000 out of 0.87000 points

The meiotic cell cycle involves two cell divisions but only one DNA replication. Selected Answer:

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Tru e

Question 19 0.87000 out of 0.87000 points

An organism with a haploid number of 10 will produce 1024 combinations of chromosomes at the end of meiosis. Selected Answer:

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Tru e

Question 20 0.87000 out of 0.87000 points

An organism with a diploid chromosome number of 46 will produce 223 combinations of chromosomes at the end of meiosis. Selected Answer:

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Tru e

Question 21 0.87000 out of 0.87000 points

Eukaryotic chromosomes contain two general domains that relate to the degree of condensation. These two regions are ________. Selected Answer:

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called heterochromatin and euchromatin

Question 22 0.87000 out of 0.87000 points

Chromatin of eukaryotes is organized into repeating interactions with protein octomers called nucleosomes. Nucleosomes are composed of which class of molecules? Selected Answer:

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histon es

Question 23 0.86000 out of 0.86000 points

Which of the following is a prime number? Selected Answer:

5...