Practice Questions

TLS Online TPP Program

#Question id: 2001

A researcher is analyzing the immune response of a patient following the patientʹs exposure to an unknown agent while out of the country. The patientʹs blood is found to have a high proportion of lymphocytes with CD8 surface proteins. What is the likely cause?

#Unit 4. Cell Communication and Cell Signaling

The patient encountered a bacterial infection which elicited CD8 marked T cells.
The disease must have been caused by a multicellular parasite, such as can be encountered in polluted water sources.
The CD8 proteins would be discharged from these lymphocytes to lyse the infected cells.
The CD8 proteins marked the surfaces of cytotoxic T cells to attack virus-infected host cells.

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TLS Online TPP Program

#Question id: 15214

#Unit 13. Methods in Biology

Gels of 15% polyacrylamide are useful for separating proteins in the range Mr = 100,000 to 10,000, while a 7.5% gel are used to separate

TLS Online TPP Program

#Question id: 23846

#Unit 2. Cellular Organization

Which regulatory protein is blocking actin and myosin from binding?

TLS Online TPP Program

#Question id: 5826

#Unit 8. Inheritance Biology

____ is a disease that causes progressive neurological degeneration that progresses to mental retardation and general loss of body function.

TLS Online TPP Program

#Question id: 24251

#Unit 2. Cellular Organization

Which of the following does not contain HFD

TLS Online TPP Program

#Question id: 18613

#Unit 13. Methods in Biology

The size of a PCR product is mainly determined