Practice Questions

TLS Online TPP Program

#Question id: 1195

Growth factors are local regulators that:

#Unit 4. Cell Communication and Cell Signaling

are modified fatty acids that stimulate bone and cartilage growth
are found on the surface of cancer cells and stimulate abnormal cell division
bind to cell-surface receptors and stimulate growth and development of target cells
convey messages between nerve cells

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TLS Online TPP Program

#Question id: 23150

#Unit 13. Methods in Biology

How fura-2 dye moves inside the cell through plasma membrane?

TLS Online TPP Program

#Question id: 23151

#Unit 13. Methods in Biology

If the concentration of Ca2+ is high inside the cell and fura-2 dye is used to map the concentration which of the following conditions will prevail?

1. Fluorescence will decrease

2. Fluorescence will increase

3. Emission of light at higher wavelength

4. Emission of light at lower wavelength

Which of the following options are correct?

TLS Online TPP Program

#Question id: 23152

#Unit 13. Methods in Biology

A fluorescent dye SNARF-1 that is sensitive to H+ concentrations can be used to monitor the cytosolic pH of

1. Alkaline cells

2. Acidic cells

Which of the following options are incorrect?

TLS Online TPP Program

#Question id: 23153

#Unit 13. Methods in Biology

SNARF-1is a fluorescent dye used to measure which ion concentration?

TLS Online TPP Program

#Question id: 23154

#Unit 13. Methods in Biology

When the organelles pH is acidic the how the SNARF-1 dye measures this acidity?

TLS Online TPP Program

#Question id: 23155

#Unit 13. Methods in Biology

Match the following ions in column I with their relevant dyes column II.

Column I Column II

1. K+ a. Fura-2

2. Ca2+ b. SNARF-1

3. H+ c. Ion potassium green

Which of the following options is correct?