3.1 Biological information flow

Question 1

central dogma

Answer 1

DNA is transcribed into RNA, which is translated into protein

Question 2

rRNA

Answer 2

• not translated
• single strands of RNA assembled with proteins
• integrated with ribosomal proteins
• considered to be stable RNA

Question 3

tRNA

Answer 3

• not translated
• folded into a secondary structure as a tRNA for translation
• considered to be stable RNA

Question 4

mRNA

Answer 4

TRANSLATED INTO PROTEIN!!
- considered unstable RNA

Question 5

stable RNA

Answer 5

tRNA
rRNA
either bind with proteins or fold to form 2 structures
this protects the RNA from degradation

Question 6

unstable RNA

Answer 6

mRNA
RNases are present everywhere, degrade RNA easily as it is single-tranded

Question 7

transcription

Answer 7

genetic info in DNA is used as a template to generate a molecule of RNA
○ First step in gene expression
§ Production o f a functional gene product

Question 8

Translation

Answer 8

molecule of RNA is used as a code for the sequence of amino acids in a protein
○ Second step