B4- Genetic information, variation and relationships between organisms

Question 1

Length of DNA in eukaryotes?

Answer 1

Longer

Question 2

Length of DNA in prokaryotes?

Answer 2

Shorter

Question 3

Shape of DNA in eukaryotes?

Answer 3

Linear

Question 4

Shape of DNA in prokaryotes?

Answer 4

Circular

Question 5

Proteins associated with DNA in eukaryotes?

Answer 5

Histones

Question 6

Proteins associated with DNA in prokaryotes?

Answer 6

None

Question 7

Are introns present in eukaryotes or prokaryotes?

Answer 7

Present in both

Question 8

What is an intron?

Answer 8

A non-coding piece of DNA

Question 9

What four things is a genetic code said to be?

Answer 9

• A triplet code
• Degenerate
• Non-overlapping
• Universal

Question 10

What is the triplet code?

Answer 10

Each amino acid is coded by three bases

Question 11

How many different combinations are there in the triplet code?

Answer 11

64

Question 12

How many types of amino acid are there?

Answer 12

20

Question 13

What does the amount of possible combinations of the triplet code compare with the amount of different types of amino acid tell us?

Answer 13

That more than one code can code for an amino acid.

Question 14

Name the process by which mRNA is formed in the nucleus.

Answer 14

Transcription

Question 15

What does degenerate mean in terms of the genetic code?

Answer 15

Some of the 20 amino acids can be specified by more than one codon.

Question 16

What does non-overlapping mean in terms of the genetic code?

Answer 16

The triplet code is read once in its correct sequence of three

Question 17

What does universal mean in terms of the genetic code?

Answer 17

It is the same in all living organisms