Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 31802
TLS Online TPP Program

#Question id: 17082

What is an Aminopterin

#Unit 12. Applied Biology
  1. Derivative of folic acid
  2. Vitamin A
  3. Competitive inhibitor of DHFR
  4. Both A &C
More Questions
TLS Online TPP Program

#Question id: 5058

#Unit 5. Developmental Biology

 In the formation of vertebrate eye, optic vesicle and head ectoderm are-
TLS Online TPP Program

#Question id: 20409

#Unit 3. Fundamental Processes

Introns may more freely accumulate point substitutions and other changes due to 
TLS Online TPP Program

#Question id: 16953

#Unit 4. Cell Communication and Cell Signaling

The ability of any stem cell to self-renew and differentiate depends on the structural organization and cellular function of specialized anatomic microenvironments known as stem cell niches. These sequestered regions are typically populated by a supportive network of stromal cells. Stem cell niche stromal cells express soluble and membrane-bound proteins that regulate cell survival, proliferation, differentiation, and trafficking. Which statements is true about HSCs?
TLS Online TPP Program

#Question id: 804

#Unit 1. Molecules and their Interaction Relevant to Biology

With respect to microRNAs, which, if any, of the following statements, is false?

a) A microRNA normally works by binding to perfectly complementary sequences within an RNA transcript, usually an mRNA.

b) Like the great majority of mRNAs an miRNA is usually produced as a larger precursor RNA that is capped and has a 3’ poly(A) tail.

c) The precursor miRNA undergoes different types of post-transcriptional cleavage by endoribonucleases that are specific for double-stranded target sequences.

d) A nuclear endoribonuclease called dicer cleaves the miRNA precursor so that it forms a stem-loop RNA.
TLS Online TPP Program

#Question id: 6951

#Unit 5. Developmental Biology

In chick development, the cell movement during gastrulation is called: