Practice Questions

TLS Online TPP Program

#Question id: 12986

Infant mortality and life expectancy at birth in developed and developing countries.

What is a logical conclusion that can be drawn from the graphs above?

#Unit 10. Ecological Principles

Developed countries have lower infant mortality rates and lower life expectancy than developing countries.
Developed countries have higher infant mortality rates and lower life expectancy than developing countries.
Developed countries have lower infant mortality rates and higher life expectancy than developing countries.
Developed countries have higher infant mortality rates and higher life expectancy than developing countries.

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TLS Online TPP Program

#Question id: 34111

#Unit 2. Cellular Organization

A. 11-nm chromatin fibers consist of a string of nucleosomes.

B. 30-nm fibers have six nucleosomes/turn, which are organized into a two-start helix.

C. Histone H1, histone tails, and increased ionic strength all promote the formation of the 11-nm fiber.

D. Histone octamers are well conserved during replication, with H2A-H2B dimers and H32-H42 tetramers are.

Which of the correct combination of statements

TLS Online TPP Program

#Question id: 34112

#Unit 2. Cellular Organization

A. When interphase nuclei are suspended in a solution of low ionic strength, they swell and rupture to release fibers of chromatin.

B. Individual nucleosomes can be obtained by treating chromatin with the endonuclease micrococcal nuclease

C. When chromatin is digested with MNase, the DNA is cleaved into integral multiples of a unit length can be Fractionated by gel electrophoresis reveals the “ladder”

D. With MNase more than 95% of nuclear DNA can be recovered in the form of the 200-bp ladder.

Choose true and false

TLS Online TPP Program

#Question id: 34113

#Unit 2. Cellular Organization

Which of the following is incorrect statement

TLS Online TPP Program

#Question id: 34114

#Unit 2. Cellular Organization

The tail of which histone/s is able to contact an H2A-H2B dimer in an adjacent nucleosome, which may contribute to the formation of higher order structures

TLS Online TPP Program

#Question id: 34115

#Unit 2. Cellular Organization

Choose correct statement

TLS Online TPP Program

#Question id: 34116

#Unit 2. Cellular Organization

A. The positive charge on lysine is neutralized upon acetylation

B. Methylated lysine and arginine are neutral.

C. Lysine can be mono-, di-, or triacetylated

D. Arginine can be mono or diacetylated.

E. Both Lysine and Arg can be acetylated

Choose true and false