When a cell is in equilibrium with its environment, which of the following processes occurs for substances that can diffuse through the plasma membrane?

TLS Online TPP Program

#Question id: 192

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the role of the magnesium ion in kinases that require the magnesium-ATP complex to donate phosphoryl groups?

TLS Online TPP Program

#Question id: 193

#Unit 1. Molecules and their Interaction Relevant to Biology

An ion commonly found in metalloenzymes and which can undergo reversible oxidation and reduction is

TLS Online TPP Program

#Question id: 194

#Unit 1. Molecules and their Interaction Relevant to Biology

Which does not return to its original form after each catalysis?

TLS Online TPP Program

#Question id: 195

#Unit 1. Molecules and their Interaction Relevant to Biology

Vitamin C is a vitamin but not a coenzyme because it

TLS Online TPP Program

#Question id: 196

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct about S-adenosylmethionine (SAM) is formed from the amino acid methionine so that

A) methyl groups can be formed.

B) it can react with nucleophilic acceptors.

C) it can donate methyl groups in many biosynthetic reactions.

TLS Online TPP Program

#Question id: 197

#Unit 1. Molecules and their Interaction Relevant to Biology

A nucleotide-sugar coenzyme involved in carbohydrate metabolism (UDP-glucose) is formed when UTP reacts with a glucose molecule. More UTP is made available for additional reactions by the transfer of a phosphate group from