Practice Questions

TLS Online TPP Program

#Question id: 4619

Within six months of effectively using methicillin to treat S. aureus infections in a community, all new S.aureus infections were caused by MRSA. How can this best be explained?

#Unit 11. Evolution and Behavior

A patient must have become infected with MRSA from another community.
In response to the drug, S. aureus began making drug-resistant versions of the protein targeted by the drug.
Some drug-resistant bacteria were present at the start of treatment, and natural selection increased their frequency.
S. aureus evolved to resist vaccines.

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TLS Online TPP Program

#Question id: 19375

#Unit 12. Applied Biology

In case of certain endogenous pathways, the activity of a specific enzyme may be rate limiting for the pathway. What could be done to enhance the productivity of the pathway?

TLS Online TPP Program

#Question id: 19376

#Unit 12. Applied Biology

As transgene products participate in the cell physiology and biochemistry. Therefore, they are likely to generate

TLS Online TPP Program

#Question id: 19377

#Unit 12. Applied Biology

Glyphosate is a broad spectrum herbicide that inhibits the enzyme

TLS Online TPP Program

#Question id: 19378

#Unit 12. Applied Biology

Enzyme EPSPS is involved in biosynthesis of

TLS Online TPP Program

#Question id: 19379

#Unit 12. Applied Biology

The killing action of glyphosate results primarily from ________ the cells of aromatic amino acids

TLS Online TPP Program

#Question id: 19380

#Unit 12. Applied Biology

Glyphosate results primarily from starving the cells of aromatic amino acids, which leads to