Chp 4

Question 1

This is a long thread like molecule with a uniform diameter of two nm though it’s length varies greatly from smallest to largest chromosomes

Answer 1

DNA

Question 2

This consist of a sugar a phosphate group and a single or double ringed nitrogenous base

Answer 2

Nucleotides

Question 3

DNA does not exist as a naked double helix in the nucleus of a cell but is complexed with proteins to form a fine ligamentous material

Answer 3

Chromatin

Question 4

In most cells the chromatin occurs as 46 long filaments
this is called what
In the nucleus of a dividing so the chromatin condenses so that each _____, now made up of two sister chromatids can be seen with a light microscope

Answer 4

Chromosomes

Question 5

DNA is a polymer of _____, each of which consist of a phosphate a sugar and a single or double ringed nitrogenous base

Answer 5

Nucleotides

Question 6

DNA molecule wrapped around a cluster of histones to form which of the following

Answer 6

Nucleosome

Question 7

When a cell is preparing to divide it makes a exact copy of all its nuclear dna eat chromosomes then consists of two parallel filaments called?

Answer 7

Sister chromatids

Question 8

Sister chromatids are joined together at a pinched spot called the

Answer 8

Centromere

Question 9

All the coding and non coding dna found in the haploid number of chromosomes from one organism is

Answer 9

Genome

Question 10

The step of protein synthesis in which dna is used to make mRNA

Answer 10

Transcription

Question 11

Transcription is the process of copying genetics instructions from molecules to ____to mRNA

Answer 11

DNA

Question 12

Which of the following statements are true regarding introns

Answer 12

An intron Is a portion of mRNAthat does not code for proteins
An intron is a portion of mRNA that must be removed before translation