RAT #8 - Chromosome Structure Flashcards

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1
Q

A gene can be defined as a segment of DNA that codes for:

a. messenger RNA
b. a functional product
c. messenger RNA or ribosomal RNA
d. a protein

A

b. a functional product

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2
Q

“beads on a string” refers to?

a. 2nd order of chromatin structure
b. 1st order of chromatin structure

c. heterochromatin
d. 3rd order of chromatin structure

A

b. 1st order of chromatin structure

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3
Q

What is Chromatin?

DNA + protein

DNA + RNA
RNA + protein
DNA + RNA + protein

A

DNA + protein

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4
Q

What protein structure organizes DNA in nucleosomes and/or chromatosomes?

a. Helicases
b. Topoisomerase
c. Histones
d. Bridge proteins

A

c. Histones

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5
Q

Euchromatin consists of?

a. is 300 nm in size

b. Decondensed, Transcriptionally Active Chromatin
c. Highly Condensed, Transcriptionally Inactive Chromatin

d. Looped-Solenoid form of Chromatin

A

b. Decondensed, Transcriptionally Active Chromatin

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6
Q

{True / False}

Heterochromatin gets its name from the fact that it contains a mixture of active and inactive genes.

A

FALSE

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7
Q

{True / False}

Interaction between the Finger-like Projections of Histones with DNA is based on a CHARGE Attraction.

A

TRUE

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8
Q

Kinetochores are the:

a. structures at the base of cilia and flagella

b. regions where two chromosomes remain attached during mitosis c. same as centromeres
d. sites of spindle fiber attachment to chromosomes

A

d. sites of spindle fiber attachment to chromosomes

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9
Q

A chromosome is made up of __________ genes?

a. two
b. large numbers of

c. one
d. several

A

b. large numbers of (genes)

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10
Q

One long DNA molecule is found in each?

a. Nucleus
b. Nucleosome
c. Chromosome
d. Gene

A

c. Chromosome (?)

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