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TLS Online TPP Program

#Question id: 2227

Which of the following statements is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal?

#XL - Q Biochemistry

  1. Sodium and glucose compete for the same binding site in the cotransporter.

  2. Glucose entering the cell down its concentration gradient provides energy for uptake of sodium ions against the electrochemical gradient.

  3. Sodium ions can move down their electrochemical gradient through the cotransporter whether glucose is present outside the cell.

  4. A substance that blocks sodium ions from binding to the cotransport protein will also block the transport of glucose.

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TLS Online TPP Program

#Question id: 19565

#XL - P Chemistry

Inorganic graphite is ———–
TLS Online TPP Program

#Question id: 1758

#XL - Q Biochemistry

The specificity of antibody secreted by a B-cell may not be the same as that of the surface Ig of the clonal parent because of:
TLS Online TPP Program

#Question id: 4631

#XL - S Microbiology

As a young biologist, Charles Darwin had expected the living plants of temperate South America would resemble those of temperate Europe, but he was surprised to find that they more closely resembled the plants of tropical South America. The biological explanation for this observation is most properly associated with the field of
TLS Online TPP Program

#Question id: 4573

#XL - S Microbiology

Which of the following pieces of evidence most strongly supports the common origin of all life on Earth?
TLS Online TPP Program

#Question id: 4610

#XL - S Microbiology

It has been observed that organisms on islands are different from, but closely related to, similar forms found on the nearest continent. This is taken as evidence that ________.