dna rna protein synthesis

Question 1

mRNA

Answer 1

messenger RNA - carries informations to the ribosome
forms a complementary copy of one Dna strand in gene

travels from nucleus to cytoplasm carrying info as codons

associates with ribosome and tRNA anticodons

Question 2

what is the DNA replication pattern?

Answer 2

semiconservative

Question 3

translation occurs in 3 steps:

Answer 3

initiation - complex forms
Elongation - second charged tRNA enters P site
-peptide bond formation
Termination - stop codon enters A site`

Question 4

what does tRNA do

Answer 4

carries amino acids for polypeptide assembly

Question 5

transcription occurs in 3 processes

Answer 5

Rna polymerase binds to promoter 
2. Elongation: Rna poly. unwinds DNA 
- synthesizes transcript 
3. Termination 
specific stop sequence 
rna poly. disengages

Question 6

translation

Answer 6

converts RNA sequence to amino acid sequence of a polypeptide
(trna lines up amino acids into protein)

Question 7

RNA (ribonucleic acid) differs from DNA:`

Answer 7

usually only one polynucleotide strand

• sugar is ribose
• contains uracil instead of thymine

Question 8

central dogma of molecular biology

Answer 8

The central dogma of molecular biology describes the two-step process, transcription and translation, by which the information in genes flows into proteins: DNA → RNA → protein. Transcription is the synthesis of an RNA copy of a segment of DNA.

Question 9

transcription

Answer 9

copies information from a DNA sequence to a complementary RNA sequence (MRNA)

Question 10

chargaffs rule

Answer 10

Adenine is = to thymine

Cytosine is = to guanine

Question 11

dna structure

Answer 11

double helix
made up of nucleotides
bases are ATCG

Question 12

Purines

Answer 12

Adenine and Guanine

Question 13

Pyrimidines

Answer 13

Cytosine and Thymine