Week 5

Question 1

Med example

Answer 1

Pituatiry dwarfism,

Question 2

How is DNA fit into the nucleus

Answer 2

Split between 23 chromosomes

Question 3

Mitosis

Answer 3

Cell division

Question 4

Name the 3 phases in the cell cycle

Answer 4

Interphase, M, interphase

Question 5

What are the 3 dna sequences needed in a chromosome

Answer 5

Telomere, rep origin, centromere

Question 6

What are nucelosome made of?

Answer 6

Histone proteins

Question 7

How many histone proteins does each nucleosome contain

Answer 7

8

Question 8

Where are ribosomes produced

Answer 8

Nucleoli

Question 9

How is each unit of DNA symboliosed?

Answer 9

with a letter e.g A

Question 10

Gene def

Answer 10

A gene can be defined as the length of DNA required to produce a given polypeptide

Question 11

The central dogma

Answer 11

flow of info is DNA_RNA_Protein

Question 12

RNA copies of genes are made by

Answer 12

RNA polymerase

Question 13

Name the grooves on a double helix

Answer 13

Major and minor groove

Question 14

Protein motifs

Answer 14

Regular combinations of secondary structures

Question 15

Activators…

Answer 15

Boost transcription

Question 16

Repressors…

Answer 16

Decrease transcription

Question 17

What AA does bacteria need?

Answer 17

Tryptophan, usually got by food

Question 18

What is needed to synthesise TRP

Answer 18

5 enzymes

Question 19

Operon def

Answer 19

a bacterial gene cluster controlled by a single promoter eg the Trp operon

Question 20

What is TRP operon controlled by

Answer 20

Repressor

Question 21

Eucaryotes have …

Answer 21

Linear chromosomes and uninterrupted genes

Question 22

Transcription factors

Answer 22

Refers to the proteins involved in the process of converting dna - rna, which depend on the signals in dna, genes are turned on/off by them