Practice Questions

TLS Online TPP Program

#Question id: 4818

Researchers found a strain of E. coli bacteria that had mutation rates one hundred times higher than normal. Which of the following statements correctly describes the most likely cause of these results?

#Unit 3. Fundamental Processes

The single-strand binding proteins were malfunctioning during DNA replication.
There were one or more base pair mismatches in the RNA primer.
The proofreading mechanism of DNA polymerase was not working properly.
The DNA polymerase was unable to add bases to the 3′ end of the growing nucleic acid chain.

More Questions

#Question id: 82

#Unit 1. Molecules and their Interaction Relevant to Biology

The structures of D-ribose and D-arabinose are shown below. These two molecules are

#Question id: 83

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is incorrect about the intramolecular cyclization reaction of glucose in solution ________.

#Question id: 84

#Unit 1. Molecules and their Interaction Relevant to Biology

Below is the Fischer projection of D-galactose. Which is the proper Haworth projection of β-D-galactopyranose?

#Question id: 85

#Unit 1. Molecules and their Interaction Relevant to Biology

Below is the structure for a cyclic D-monosaccharide. Which is the anomeric carbon atom?

#Question id: 86

#Unit 1. Molecules and their Interaction Relevant to Biology

Examine the cyclic D-monosaccharide shown below. The ring structure is the ________ and the linear form of this monosaccharide must be a/an ________.

#Question id: 87

#Unit 1. Molecules and their Interaction Relevant to Biology

The compounds α-D-fructofuranose and β-D-fructofuranose are ________.