Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 3651
TLS Online TPP Program

#Question id: 3864

RNA polymerase:

#Unit 3. Fundamental Processes

  1. binds tightly to a region of DNA thousands of base pairs away from the DNA to be transcribed.

  2. can synthesize RNA chains de novo (without a primer).

  3. has a subunit called lambda, which acts as a proofreading ribonuclease.

  4. separates DNA strands throughout a long region of DNA (up to thousands of base pairs), then copies one of them.

More Questions
TLS Online TPP Program

#Question id: 4530

#Unit 3. Fundamental Processes

A protein complex engaged in the pairing of homologous chromosomes during cell division has also been implicated in stabilizing certain enhancer–promoter loops.
TLS Online TPP Program

#Question id: 13063

#Unit 13. Methods in Biology

Precision will be reduced, but yield will be increased
Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.
Which of the statement is worng? Aminopetrin………s
TLS Online TPP Program

#Question id: 31118

#Unit 2. Cellular Organization

Which of the following protein shows lowest FRAP?
TLS Online TPP Program

#Question id: 19742

#Unit 3. Fundamental Processes

Match the following 

Organism

 Size of RNA component

A) Tetrahymena

i) 451 bases long

B) Humans

ii) 1.3 kb in yeast

C) Yeast

iii) 159 bases long

TLS Online TPP Program

#Question id: 29065

#Unit 10. Ecological Principles

Ecological and crude density of fish prey in related with predator. Water level is drop during the dry season and further increases in a rainy season. Following some observation effect are present on their density
A) Ecological density is not change with respect to water level       
B) Ecological density is gradually decrease with low water level
C) Crude density increases over ecological density during low water level             
D) Ecological density increases while crude density decreases during low water level
E) There is no effect on crude density with seasonal water level
Which of the following above observation is correct?