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TLS Online TPP Program

#Question id: 3566

Two organisms, with genotypes BbDD and BBDd, are mated. Assuming independent assortment of the B/b and D/d genes, determine the genotypic ratios in offspring that would occur.

#Unit 8. Inheritance Biology

  1. 1/2 BBDD, 1/2 bbdd

  2. 1/4 BBDD, 1/4 BbDD, 1/4 BBDd, 1/4 BbDd

  3. 9/16 BBDD, 3/16 BbDD, 3/16 BBDd, 1/16 bbdd

  4. 1/4 BBDD, 1/2 BbDd, 1/4 bbdd

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TLS Online TPP Program

#Question id: 3393

#Unit 11. Evolution and Behavior

Natural Selection can maintain a polymorphism when

a. heterozygote is fitter than the homozygote

b. Fitnesses of genotypes are negatively frequency dependent.

c. Fitnesses of genotypes are positive frequency dependent.

d. One homozygote is fitter than the heterozygote
TLS Online TPP Program

#Question id: 23166

#Unit 13. Methods in Biology

To visualize two proteins in fixed Hela cells using an epifluorescence microscope. Below is a list of various fluorophores (dyes) available to see those proteins.
1. FITC
2. GFP
3. Fluorescein
4. Alexa 568
Select the correct combinations of the appropriate dyes that would typically be utilized to observe co-localization in an epifluorescence microscope?
TLS Online TPP Program

#Question id: 14727

#Unit 13. Methods in Biology

Two persons A and B have respectively n + 1 and n coins, which they toss simultaneously. Then the probability that A will have more heads than B is
TLS Online TPP Program

#Question id: 2691

#Unit 2. Cellular Organization

Which of the following is responsible for the formation of Pseudogenes?
TLS Online TPP Program

#Question id: 2580

#Unit 2. Cellular Organization

Following statements are regarding to mechanism of kinesin-1 movement.

A. Initially leading head tightly bound to the microtubule and not bound by any nucleotide, while the trailing head is weakly bound to the microtubule and has ADP bound.

B. Binding of ATP induces a conformational change causing the linker to swing forward and dock into the head. This motion swings the former trailing head to become the leading head.

C. Binding of ATP induces a conformational change causing the linker to swing forward and dock into the head. This motion swings the former leading head to become the trailing head.

D. When leading head releases ADP and coordinately the trailing head hydrolyzes ATP to ADP + Pi. Pi is released and the linker becomes undocked.

E. When trailing head releases ADP and coordinately the leading head hydrolyzes ATP to ADP + Pi. Pi is released and the linker becomes undocked.

Which of the following combination is correct?