WorksheetsTEST 2 MOLECULAR BIOLOGY (LBO21103)
Total questions: 20
Worksheet time: 20mins
Homologous DNA recombination in prokaryotes take place for_______________
Repair
Increasing variability
Incorporation of gene
Taking up a plasmid from media
Rec A doesn’t____________________
Perform spooling
Help in branch migration
Cleaves at recombination site
Line up the homologous chromosome with the one it surrounds
The Ruv A of the resolvosome complex binds at________
After exchange
At the terminals
At the branch point
On each chromosome on either side of branch point
What is the other name of DSB repair pathway?
RecBAD pathway
RecBCD pathway
RecABD pathway
RecDCB pathway
The RecBCD pathway involves the use of ligases.
True
False
What is branch migration?
Formation of lesion
Dissolution occurs
Formation of heteroduplex DNA
Break and reformation of identical base pairs
What is resolution?
Exchange of DNA fragments
Cleavage of holiday junction
Heterochromatin structure formation
Regeneration of duplex DNA molecule
Which type of DNA is connected by a holiday junction?
Mutated DNA
Asymmetric DNA
Heteroduplex DNA
Homologous DNA duplex
From what the splice recombination product is formed?
Spliced DNA
Mutated DNA
Cross over DNA
Recombined DNA
What is a crossover product?
Spliced DNA
Mutated DNA
Crossover DNA
Reassorted DNA
These are types of RNA EXCEPT
tRNA
rRNA
ssRNA
mRNA
Why RNA is less stable compared to DNA?
because it is single stranded
because it can be stranded
because it is small
because it contain ribose
These are the differentiation between DNA and RNA EXCEPT
RNA is smaller than DNA
RNA contain uracil instead of thymine
RNA contain ribose instead of thymine
RNA capable of folding into complex structure
These are four eukaryotic rRNA species EXCEPT
28S
16S
18S
5.8S
Which is the smallest RNA?
tRNA
rRNA
mRNA
ssRNA
These are the components of tRNA EXCEPT
anticodon loop
t-psi-loop
D-loop
C-loop
Which of these RNA contain 7-methyl guanosine?
tRNA
mRNA
rRNA
ssRNA
Which of these RNA involves in translation process?
tRNA
mRNA
rRNA
all types of RNAs
These are the examples of RNA structural motif EXCEPT
symmetric internal loop
coaxial stack
three-stem junction
U-pin loop
dsRNA can
not easily degraded
signal DNA damage and promote cell death
block protein synthesis and signal viral infection
block DNA synthesis and promote bacteria infection
