Many eukaryotic genes contain a large number of exons. Correct splicing of such genes requires that neighboring exons be ligated to one another; if they are not, exons will be left out. One early proposal suggested that the splicing machinery bound to a splice site at one end of an intron and scanned through the intron to find the splice site at the other end. Such a scanning mechanism would guarantee that an exon was never skipped. This hypothesis was tested with one minigene with a duplicated 5ʹ splice site. Find diagram of the products you expect from minigene if the splicing machinery binds to a 5ʹ splice site and scans toward a 3ʹ splice site.

TLS Online TPP Program

#Question id: 1379

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements apply to cellulose? Please select all that apply.

a) It is a polyglucose containing beta 1-6 glycosidic bonds.

b) It is a major component of plant cell walls

c) It is a polyglucose containing beta 1-4 glycosidic bonds.

d) It is a major component of Gram negative cell walls.

TLS Online TPP Program

#Question id: 26950

#Unit 10. Ecological Principles

A population is growing logistically with a growth rate (r) of 0.16/month, in an environment with a carrying capacity of 200. What is the maximum growth rate (no. of individuals/ month) that this population can achieve? 

TLS Online TPP Program

#Question id: 20324

#Unit 4. Cell Communication and Cell Signaling

What is the main difference between Gram positive and Gram-negative quorum sensing mechanism?

TLS Online TPP Program

#Question id: 11002

#Unit 7. System Physiology – Animal

A 30-year-old man has an ejection fraction of 0.25 and an end systolic volume of 150 ml. What is his end diastolic volume?

TLS Online TPP Program

#Question id: 802

#Unit 1. Molecules and their Interaction Relevant to Biology

A single-stranded DNA molecule contains 40 nucleotides with equal amounts of A, C, G, and T. This DNA strand can combine with a complementary DNA strand to form a double-stranded DNA molecule. Which is a possible sequence and structure for this DNA molecule?