TLS Online TPP Program

#Question id: 5760


The fluctuation test of Luria and Delbruck (studying resistance to bacteriophge T1 infection) established that

#Unit 8. Inheritance Biology
  1. T1 phage was a mutagen.

  2. Mutations could arise prior to the time they were selected

  3. The mutation rate varies greatly from experiment to experiment.

  4. In E. coli the number of mutants per clone was relatively constant.

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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?

TLS Online TPP Program

#Question id: 2849

#Unit 2. Cellular Organization

Methylation of lysines 4, 36, or 79 of histone H3 typically is associated……… of the genes, whereas methylation of lysines 9 or 27 of the same histone frequently is associated with …..

TLS Online TPP Program

#Question id: 2278

#Unit 2. Cellular Organization

Clusters of rRNA where ribosomes are assembled are called

TLS Online TPP Program

#Question id: 19800

#Unit 12. Applied Biology

What happens to cry protiens which is due to reduced binding of the toxin to midgut epithilium

TLS Online TPP Program

#Question id: 236

#Unit 1. Molecules and their Interaction Relevant to Biology

Which are common protein coenzymes?