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Higher Human Bio - Unit 1 (Cell Biology) > Gene Expression > Flashcards

Flashcards in Gene Expression Deck (23)
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1

Gene expression involves both

Transcription & Translation of DNA sequences

2

RNA is

single stranded

3

RNA contains the bases

Guanine, Cytosine, Adenine and Uracil

4

The three types of RNA are

mRNA. tRNA and rRNA

5

The role of mRNA is to carry

a copy of the DNA code from the nucleus to the ribosome

6

The role of tRNA is to carry

specific amino acids to the ribosome

7

rRNA joins with protein to make

ribosomes

8

Transcription takes place in the

nucleus

9

Each triplet of bases on mRNA is called

a codon

10

A triplet of bases on tRNA is called

an anticodon

11

The enzyme involved transcription is

RNA polymerase

12

Introns are removed from the

primary transcript

13

Introns are

non coding regions

14

Exons are

coding regions

15

Exons are joined together to form a

mature transcript

16

The process of forming a mature transcript (from a primary transcript) is called

RNA Splicing

17

Translation begins at a

start codon

18

Translation stops at a

stop codon

19

The genetic code is translated into a sequence of

amino acids

20

Amino acids are joined together by

peptide bonds

21

Polypeptide chains can fold into a 3D shape and are held together by

Hydrogen bonds

22

Alternative RNA splicing allows

different proteins to be expressed from one gene

23

Proteins have different shapes because they have

different functions