Practice Questions

TLS Online TPP Program

#Question id: 1121

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

#Unit 4. Cell Communication and Cell Signaling

Cell-signaling pathways are seen in "primitive" cells such as bacteria and yeast.
Bacteria and yeast cells signal each other in a process called quorum sensing.
Signal transduction molecules identified in distantly related organisms are similar.
Most signals in all types of cells are received by cell surface receptors.

More Questions

#Question id: 26573

#Unit 3. Fundamental Processes

#Question id: 26574

#Unit 3. Fundamental Processes

Which of the following is incorrect about De novo methylase & Perpetuation methylase

a. De novo methylase recognises unmethylated strand and methylated at single strand

b. De novo methylase recognises unmethylated strand and methylated at single strand

c. Perpetuation methylase recognises hemimethylated strand and methylated at both strand

d. Perpetuation methylase recognises unmethylated strand and methylated at one strand

#Question id: 26575

#Unit 3. Fundamental Processes

Choose the correct statement about degeracy of genetic codon

a.Maximum degeneracy shows by Arg, Leu, Ser, that is 6

b.None of the amino acid have denegeracy 5

c.Ala, Gly, Pro, Thr, Val have denegeracy 4

d.Ala, Gly, Pro, Thr, Val have denegeracy 4

#Question id: 26576

#Unit 3. Fundamental Processes

In mitochondria UGA codes for

#Question id: 26577

#Unit 3. Fundamental Processes

#Question id: 26578

#Unit 3. Fundamental Processes

According to the "wobble hypothesis" inosine at the third position of the anticodon cannot form hydrogen bonds with