Practice Questions

TLS Online TPP Program

#Question id: 39850

Q. A student performs a BLAST search and finds that Protein A and Protein B share 65% sequence similarity over their entire length. Which of the following statements is scientifically accurate regarding their relationship?

#Bio-Informatics

Protein A and Protein B share 65% homology.
The two proteins are 65% identical in their primary sequence.
Protein A and Protein B are homologous, provided the similarity is statistically significant.
65% similarity is insufficient to suggest an evolutionary relationship; they are likely analogous.

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TLS Online TPP Program

#Question id: 524

#Biochemistry

The enzyme that catalyzes the conversion of pyruvate to lactate is ________.

TLS Online TPP Program

#Question id: 525

#Biochemistry

Under what situation might lactic acidosis occur?

TLS Online TPP Program

#Question id: 526

#Biochemistry

Which substance causes muscles to ache during strenuous exercise?

TLS Online TPP Program

#Question id: 527

#Biochemistry

What chemical species activates the GLUT4 protein to transport glucose into cells?

TLS Online TPP Program

#Question id: 528

#Biochemistry

Once inside a cell, glucose is rapidly phosphorylated to glucose-6-phosphate. What is the main purpose of this phosphorylation?

TLS Online TPP Program

#Question id: 529

#Biochemistry

When a muscle is stimulated to contract aerobically, less lactic acid is formed than when it contracts anaerobically because: