Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Molecular Biology > chromosome structure > Flashcards

chromosome structure Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

Where is the DNA located?

A

chromosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is chromatin made of?

A

DNA and protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the types of interphase chromatin?

A

euchromatin and heterochromatin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is euchromatin?

A

transcriptionally active DNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is heterochromatin?

A

inactive DNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

types of heterochromatin

A

constitutive and facultative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is constitutive DNA

A

mostly repetitive, never expressed, near centromere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

acrocentric chromosome

A

p arm barely seen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

metacentric

A

centromere in middle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

telocentric

A

centromere at end

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

submetacentric

A

short p arm long q arm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is a karyotype?

A

the complete set of diploid chromosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

geimsha staining

A

reveals g banding patterns and discriminates between chromosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is the centromere made of?

A

highly repeated satellite DNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is satellite DNA?

A

repeating non coding DNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Where is the telomere located?

A

at the ends of the chromosomes

17
Q

function of telomere?

A

prevent degradation, maintains chromosomal integrity, molecular marker of ageing process

18
Q

by how much is DNA condensed

A

by a factor of 10^5

19
Q

what is the structural unit of DNA packing in eukaryotes

A

nucleosomes

20
Q

what is a histone?

A

positively charged arginine or lysine rich proteins that joined together by ionic bonds with neg phosphate backbone

21
Q

types of histone

A

H1. H2A. H2B. H3. H4.

22
Q

how many histones form a nucleosome

A

8

23
Q

number of base pairs in octamer

A

200

24
Q

solenoid

A

6 nucleosomes per turn

25
Q

what creates supercoils in the loops of dna

A

topoisomerase and dna gyrase

Molecular Biology (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions