問題一覧
1
What helix is DNA?
double
2
What is translation ?
RNA molecules is used to produce proteins
3
What is topoisomerase?
prevents over winding of the DNA as it opens
4
What do nucleotides have ?
phosphate group, deoxyribose sugar , complementary bases
5
What are codons ?
3 letter words or 3 nucleotide portions
6
What is DNA polymerase ?
makes new DNA strands
7
What is replication ?
cells reproducing
8
In bacteria DNA is wrapped around what ?
histone proteins
9
What is helicase ?
it separates the two strands of the DNA helix
10
What is transduction ?
a bacteriophage injects DNA that is a hybrid of viral DNA and DNA from a previously infected bacterial cell
11
What is transformation ?
the cell takes up DNA directly from the environment. The DNA may remain separate as a plasmid or be incorporated into the host genome
12
What is a genome ?
refers to all the genetic material in an organism/pathogen
13
Define bacteria operon
set of bacterial genes with a common function arranged closely together in chromosome and that are transcribed and translated together
14
Proofreading activity of DNA polymerase is ?
the ability to correct some mutations
15
What are the 2 strands of DNA held by ?
hydrogen bonds , hydrophobic forces
16
What are mutations ?
changes in DNA sequence
17
What is the start codon ?
AUG
18
What is Ligase?
final binding of nicks in DNA during synthesis and repair
19
What is transcription ?
DNA molecules is conveyed to RNA
20
What are the stop codons ?
UAA, UAG, UGA
21
What helix is RNA ?
single
22
What is conjugation ?
DNA is transferred between cells through a cytoplasmic bridge after a conjugation pilus draws the two cells close enough to form the bridge.