Practice Questions

TLS Online TPP Program

#Question id: 5281

In the mating Hfr Strs met+ his+ leu+ trp+ Ala+ X F- Strres met- his- leu- trp- Ala-. At regular interval time, the mating cells are interrupted and the cell suspensions plated on four different growth media with streptomycin. The amino acids in the growth media and the number of colonies observed on each are as follows:

Interrupted time

Composition of media

Growth

His

Leu

Ala

Trp

Met

2 min

+

-

+

+

+

Yes

10 min

+

-

-

+

+

Yes

12 min

+

-

-

+

-

No

15 min

+

-

-

-

+

Yes

20 min

-

-

-

-

+

Yes

What is the order of transfer of the genes?

#Unit 8. Inheritance Biology

Leu- Ala- His- Met - Trp
Leu- Trp- His- Met-Ala
Ala- Trp- His- Met- Leu
Leu- Ala- Trp- His- Met

More Questions

TLS Online TPP Program

#Question id: 15447

#Unit 4. Cell Communication and Cell Signaling

During development two types of B-cells will be formed:-

Some features about T1 and T2 cells given in below;

a) Maturity achieve

b) Found in blood circulation

c) Presence of Immunoglobulin IgM high and IgD low

d) Expressing CD21 and CD23

e) Cell expressing BAFF-R, Which bind with BAFF survival factor

Match the cell with their correct features;

TLS Online TPP Program

#Question id: 1389

#Unit 4. Cell Communication and Cell Signaling

Why has C. elegans proven to be a useful model for understanding apoptosis?

TLS Online TPP Program

#Question id: 1390

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements describes the events of apoptosis?

TLS Online TPP Program

#Question id: 1391

#Unit 4. Cell Communication and Cell Signaling

If an adult person has a faulty version of the human analog to ced-4 of the nematode, which of the following is most likely to result?

TLS Online TPP Program

#Question id: 1392

#Unit 4. Cell Communication and Cell Signaling

In the nematode C. elegans, ced-9 prevents apoptosis in a normal cell in which of the following ways?

TLS Online TPP Program

#Question id: 1393

#Unit 4. Cell Communication and Cell Signaling

In research on aging (both cellular aging and organismal aging), it has been found that aged cells do not progress through the cell cycle as they had previously. Which of the following, if found in cells or organisms as they age, would provide evidence that this is related to cell signalling?