A bag contains 2 white and 3 black balls. A ball is drawn 5 times, each being replaced before another is drawn. Find the probability that exactly 4 of the balls drawn are white.

TLS Online TPP Program

#Question id: 14828

#Unit 2. Cellular Organization

Pili are usually longer than fimbriae and number only one or two per cell. Pili are involved in motility and DNA transfer. The type of motility, called 

1. Extrusion

2. Somersaulting

3. Twitching motility 

4. Gliding motility

Which combination from the following is correct?

TLS Online TPP Program

#Question id: 611

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statement is false about the sequential theory of enzyme catalysis?

TLS Online TPP Program

#Question id: 32400

#Unit 1. Molecules and their Interaction Relevant to Biology

Pyruvate dehydrogenase kinase is

TLS Online TPP Program

#Question id: 12963

#Unit 10. Ecological Principles

The benthic zone in an aquatic biome

TLS Online TPP Program

#Question id: 361

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.