Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
DNA stands for _______ and is named after the ______ it contains.
|
deoxyribonucleic acid, sugar
|
|
|
DNA is composed of _______.
|
a polymer formed from long chains of nucleotides
|
|
|
DNA is made different from each other by the ______.
|
Nitrogen-containing base (N-base)
|
|
|
Which letters match up correctly with each other?
|
A with T and C with G - DNA
A with U and C with G - RNA |
|
|
Discoverers of DNA structure
|
Watson and Crick (1953)
|
|
|
DNA replication occurs during what process?
|
S-phase of mitosis
|
|
|
During DNA replication the DNA helicase does what?
|
seperates the double helix
|
|
|
During DNA replication the DNA polymerase does what?
|
connects the strands back together
|
|
|
During DNA replication the ligase does what?
|
seals fragments of the lagging strands back together
|
|
|
The differences of DNA and RNA are _____.
|
RNA has ribose sugar instead of deoxyribose
RNA is usually single stranded instead of double stranded RNA has U in place of T |
|
|
The similarities between DNA and RNA are ____.
|
They contain the bases A, G, C
|
|
|
The three types of RNA are ______.
|
rRNA
mRNA (messenger) tRNA (transfer) |
|
|
Where and when does transcription take place?
|
from DNA to RNA, in the nucleus
|
|
|
What are introns?
|
Sequences in the DNA that don't code for the protein - they are cut out during RNA processing
|
|
|
What is the end product of RNA processing?
|
a mature mRNA transcript without any introns
|
|
|
What is the start codon?
|
AUG - engages a ribosome to start translating an mRNA molecule
|
|
|
What is the stop codon?
|
UAA, UAG, UGA - causes the ribosome to stop translating into an mRNA
|
|
|
What is an anti-codon?
|
a region of tRNA consisting of three bases complementary to the codon of mRNA
|
|
|
What does mRNA do?
|
acts as a messenger from DNA and ribosome carrying the info from a singe gene to be transfered into a protein
|
|
|
What does tRNA do?
|
binds to a certain amino acid, one end has anticodon which binds to a complimentary codon
|
