Organisation of DNA in prokaryotes and eukaryotes

Question 1

What type of chromosomes do eukaryotes have?

Answer 1

Linear

Question 2

What are linear chromosomes?

Answer 2

Strings of DNA wrapped around proteins

Question 3

Where are linear chromosomes contained?

Answer 3

Nucleus

Question 4

Which eukaryotic organelles contain small circles of DNA?

Answer 4

Chloroplasts and mitochondria

Question 5

Do prokaryotes have a nucleus?

Answer 5

No

Question 6

Do eukaryotes have a nucleus?

Answer 6

Yes

Question 7

What type of chromosomal DNA do prokaryotes have?

Answer 7

Circular

Question 8

What type of chromosomal DNA do eukaryotes have?

Answer 8

Linear

Question 9

Give an example of a prokaryote

Answer 9

Bacteria

Question 10

Characteristics of a prokaryote

Answer 10

Have no nucleus but contain a circular chromosome and can also contain smaller circles of DNA called plasmids.

Question 11

Do prokaryotes have plasmids?

Answer 11

Yes

Question 12

Do eukaryotes have plasmids?

Answer 12

No, excluding yeasts

Question 13

Do prokaryotes have organelles with circular DNA?

Answer 13

No

Question 14

Do eukaryotes have organelles with circular DNA?

Answer 14

Yes (chloroplasts and mitochondrion)

Question 15

Ribosome size of prokaryotes

Answer 15

Small

Question 16

Ribosome size of eukaryotes

Answer 16

Large

Question 17

Cell size of prokaryotes

Answer 17

Small

Question 18

Cell size of eukaryotes

Answer 18

Large

Question 19

How is DNA packed in linear chromosomes?

Answer 19

DNA is tightly coiled around histone proteins and then the coiled DNA is folded and folded again.

Question 20

Why is DNA a unique molecule?

Answer 20

Because is can reproduce itself exactly

Question 21

When does replication of DNA take place?

Answer 21

Before mitosis

Question 22

What does replication of DNA ensure?

Answer 22

That the daughter cells have a full chromosome complement