Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 13095
TLS Online TPP Program

#Question id: 14880

Which of the following cells control the differentiation HSCs (hematopoietic stem cells)?

#Unit 4. Cell Communication and Cell Signaling
  1. Reticular cells
  2. Osteoblast cell
  3. Medullary cells
  4. Sympathetic neurons 
More Questions
TLS Online TPP Program

#Question id: 24616

#Unit 2. Cellular Organization

Technique that allows genomic fragments to be rapidly scanned for the presence of exons is called
TLS Online TPP Program

#Question id: 5378

#General Aptitude

Out of 10 persons , 9 persons spent Rs 40 each of their meals .The 10th one spent Rs 18 more than the average of expenditure of all the 10 . the total money spent by all of them is 
TLS Online TPP Program

#Question id: 13105

#Unit 13. Methods in Biology

With the help of DNA fingerprinting which can be used to determine paternity. There are three babies (Baby A, Baby B and Baby C) in a maternity ward, and three sets of confused and worried parents. (Father and Mother #1 are a couple, as are Father and Mother #2, and Father and Mother #3.) 
You do each PCR reaction on chromosome 15 and load each one into a separate well of an agarose gel, and then run the gel.
  

Given the data so far, for which of the following statement is correct
TLS Online TPP Program

#Question id: 546

#Unit 1. Molecules and their Interaction Relevant to Biology

Enzymes are potent catalysts because they:
TLS Online TPP Program

#Question id: 4296

#Unit 3. Fundamental Processes

 Normally, a stop codon is required to release the ribosome from an mRNA but what happens to a ribosome that initiates translation of an mRNA fragment that lacks a termination codon. The Ribosome stalled at broken part of mRNA. In prokaryotic cells, such stalled ribosomes are rescued by the action of a chimeric RNA molecule that is part tRNA and part mRNA, appropriately called a tmRNA. What is sequence of events of this rescue process.

A. Translocation of the peptidyl-SsrA RNA results in the release of the broken mRNA

B. the SsrAAla–EF-Tu–GTP complex binds to the A-site of the ribosome and participates in the peptidyl transferase reaction

C. portion of the SsrA RNA acts as an mRNA and encodes 10 codons followed by a stop codon

D. the protein encoded by the incomplete mRNA is fused to a 10-amino-acid “peptide tag” at its carboxyl terminus, and the ribosome is recycled. Interestingly, the 10-amino-acid tag is recognized by cellular proteases that rapidly degrade the tag and the truncated polypeptide to which it is attached