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TLS Online TPP Program

#Question id: 15412

For a trait known to be caused by a mitochondrial gene variant, there may be an occasional female that can transmit different phenotypes to her progeny on an apparently random basis. What situation might you suspect?

#Unit 8. Inheritance Biology
  1. She is heterozygous for this trait.
  2. She displays Heteroplasmy for this trait
  3. She displays a low rate of mutation.
  4. She is the product of a somatic mutation.
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TLS Online TPP Program

#Question id: 12179

#Unit 2. Cellular Organization

Match the following human ABC proteins (Column I) with their function (Column II)

Column IColumn II
A. ABCB1i. Transports Cl- ions
B. ABCB4ii. Exports phosphatidylcholine into bile
C. CFTRiii. Exports cholesterol and phospholipid for uptake into high-density lipoprotein (HDL)
iv. Exports lipophilic drugs
Which of the following is correct?
TLS Online TPP Program

#Question id: 12178

#Unit 2. Cellular Organization

Following statements are regarding to V-class ATPases.
A. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the same direction.
B. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the same direction.
C. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the opposite direction.
D. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the opposite direction.
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 12177

#Unit 2. Cellular Organization

Calculate the free energy required to move 1 mol of K+ ions from the outside of the cell (where [K+] = 4 mM) to the inside (where [K+] = 140 mM) when the membrane potential is –70 mV and the temperature is 37°C.
TLS Online TPP Program

#Question id: 11523

#Unit 2. Cellular Organization

In the given figure, which of the following complex represents high energy intermediate?
TLS Online TPP Program

#Question id: 11522

#Unit 2. Cellular Organization

What is the major function of the actuator domain in Na+-K+ ATPase?
TLS Online TPP Program

#Question id: 11521

#Unit 2. Cellular Organization

The Na+-K+ ATPase is responsible for maintaining: