Chapter 9

Chromatin fibers include (a) DNA and structural polysaccharides (b) RNA and phospholipids (c) protein and carbohydrate (d) DNA and protein (e) triacylglycerol and steroids

A nucleosome consists of (a) DNA and scaffolding proteins (b) scaffolding proteins and histones (c) DNA and histones (d) DNA, histones, and scaffolding proteins (e) histones only

The term S phase refers to (a) DNA synthesis during interphase (b) synthesis of chromosomal proteins during prophase (c) gametogenesis in animal cells (d) synapsis of homologous chromosomes (e) fusion of gametes in sexual reproduction

At which of the following stages do human skin cell nuclei have the same DNA content? (a) early mitotic prophase; late mitotic telophase (b) \(\mathrm{G}_{1} ; \mathrm{G}_{2}\) (c) \(\mathrm{G}_{1}\); early mitotic prophase (d) \(\mathrm{G}_{1}\); late mitotic telophase (e) \(\mathrm{G}_{2} ;\) late mitotic telophase

In a cell at ____________, each chromosome consists of a pair of attached chromatids. (a) mitotic prophase (b) meiotic prophase II (c) meiotic prophase I (d) meiotic anaphase I (e) all of the preceding

In an animal cell at mitotic metaphase, you would expect to find (a) two pairs of centrioles located on the metaphase plate (b) a pair of centrioles inside the nucleus (c) a pair of centrioles within each microtubule-organizing center (d) a centriole within each centromere (e) no centrioles

Cell plate formation usually begins during (a) telophase in a plant cell (b) telophase in an animal cell (c) \(\mathrm{G}_{2}\) in a plant cell (d) \(\mathrm{G}_{2}\) in an animal cell (e) a and b are correct

A particular plant species has a diploid chromosome number of 20. A haploid cell of that species at mitotic prophase contains a total of ____________ chromosomes and ____________ chromatids. (a) 20; 20 (b) 20; 40 (c) 10; 10 (d) 10; 20 (e) none of the preceding, because haploid cells cannot undergo mitosis

A diploid nucleus at early mitotic prophase has ____________ set(s) of chromosomes; a diploid nucleus at mitotic telophase has ____________ set(s) of chromosomes. (a) 1; 1 (b) 1; 2 (c) 2; 2 (d) 2; 1 (e) not enough information has been given

The life cycle of a sexually reproducing organism includes (a) mitosis (b) meiosis (c) fusion of sex cells (d) b and c (e) a, b, and \(c\)

Which of the following are genetically identical? (a) two cells resulting from meiosis I (b) two cells resulting from meiosis II (c) four cells resulting from meiosis I followed by meiosis II (d) two cells resulting from a mitotic division (e) all of the preceding

You would expect to find a synaptonemal complex in a cell at (a) mitotic prophase (b) meiotic prophase I (c) meiotic prophase II (d) meiotic anaphase I (e) meiotic anaphase II

A chiasma links a pair of (a) homologous chromosomes at prophase II (b) homologous chromosomes at late prophase I (c) sister chromatids at metaphase II (d) sister chromatids at mitotic metaphase (e) sister chromatids at metaphase I