BSC 1010 Chapter Notes - Chapter 10: Walther Flemming, Sister Chromatids, Spindle Apparatus

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2 Feb 2017

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Process is essentially the same in bacteria and eukaryotic cells. Chapter 10: how cells divide proceeds in both directions around a circular dna to a specific site of termination binary fission occurs in bacteria and is simpler. Cell grows by elongation and division occurs roughly at midcell. Cell"s other components are partitioned by the growth of new membrane and production of septum. Final event of replication is decatenation (untangling) of the final replication products. After replication and segregation, midcell region is cleared of daughter cell nucleoids, and division occurs. Chromosomes were first observed by walther flemming in 1879 (also coined the term (cid:363)mitosis(cid:364)) Have been found in the cells of all eukaryotes examined. Are composed of chromatin, a complex of dna and protein. Karyotype is the particular array of chromosomes an individual organism possesses in humans, n=23 haploid (n) is the number of complete sets of chromosomes diploid (2n) reflects the total number of chromosomes in a cell.

Related Questions

What step in DNA replication precedes the pairing of complementary bases?

	A.	polymerization of DNA.
	B.	formation of the histone core.
	C.	mitotic division.
	D.	separation of the two strands.
	E.	joining of the two strands.

In eukaryotes, transcription occurs in the

	A.	ribosome.
	B.	mitochondria.
	C.	cell membrane.
	D.	cytoplasm.
	E.	nucleus.

Normal human body cells contain how many chromosomes?

	A.	46
	B.	22
	C.	23
	D.	44
	E.	42

Hershey and Chase performed an experiment in which they used radioactive isotopes to phosphorus and sulfur to label different components of bacterial viruses. Their results clearly showed that

	A.	the viruses did not contain protein.
	B.	genetic material normally contains radioactive isotopes.
	C.	the viruses did not contain DNA.
	D.	protein was entering into the infected bacteria.
	E.	DNA was entering into the infected bacteria.

A package of histones with DNA wrapped around them forms spherical structures called

	A.	nucleosomes.
	B.	lysosomes.
	C.	ribosomes.
	D.	nucleoli.
	E.	chromatin.

DNA replication

	A.	does not require proteins.
	B.	is constantly happening in a cell.
	C.	occurs in G1 of interphase.
	D.	takes place in the nucleus of the cell.
	E.	occurs in the cytoplasm of the cell.

The two subunits of the ribosome join during

	A.	promotion of transcription.
	B.	initiation of translation.
	C.	termination of transcription.
	D.	termination of translation.
	E.	elongation.

DNA replication of a single DNA molecule is referred to as semiconservative because

	A.	each of the two DNA molecules will consist of one parental strand and one newly synthesized strand.
	B.	all the DNA strands in the two DNA molecules will have both parental and newly synthesized DNA.
	C.	it results in two nonidentical DNA molecules.
	D.	of the two DNA molecules, one is made up totally of parental DNA, while the other is entirely newly synthesized DNA.
	E.	one DNA strand is replicated continuously, while the other must be replicated discontinuously.

The bases are bonded to what part of the backbone of the DNA molecule?

	A.	the 4â carbon atom of the sugar molecule.
	B.	the 3â carbon atom of the sugar molecule.
	C.	the 5â carbon atom of the sugar molecule.
	D.	the 1â carbon atom of the sugar molecule.
	E.	the 2â carbon atom of the sugar molecule.

BSC 1010 Chapter Notes - Chapter 10: Walther Flemming, Sister Chromatids, Spindle Apparatus

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