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?

#XL - S Microbiology

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: 1567

#XL - S Microbiology

Which of the following cell types are responsible for initiating a secondary immune response?

TLS Online TPP Program

#Question id: 17284

#XL - S Microbiology

Which kind of plant tissue should lack phragmoplasts?

TLS Online TPP Program

#Question id: 19549

#XL - P Chemistry

The alkaline earth metal present in chlorophyll is ———–

TLS Online TPP Program

#Question id: 10574

#XL - T Zoology

Which of the following statements about the evolution of life histories is correct?

TLS Online TPP Program

#Question id: 1095

#XL - Q Biochemistry

What does it mean to say that a signal is transduced?