TLS Online TPP Program

#Question id: 7206


Which of the following statements explains the dominant mutation of Pmar1 results in a vegetalized embryo is due to:

#Unit 5. Developmental Biology
  1. HesC is activated; Mesodermal specification is induced by delta protein.
  2. HesC transcription is repressed which further leads to activation of skeletogenic genes in all cells.
  3. High concentration of Beta-catenin in the micromeres.
  4. Otx and maternal beta-catenin activated Pmar1.
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TLS Online TPP Program

#Question id: 2556

#Unit 2. Cellular Organization

Which of the following processes generates a proton-motive force in mitochondria?

TLS Online TPP Program

#Question id: 2557

#Unit 2. Cellular Organization

In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. What purpose must this serve?

TLS Online TPP Program

#Question id: 2558

#Unit 2. Cellular Organization

A young dog has never had much energy. He is brought to a veterinarian for help, and she decides to conduct several diagnostic tests. She discovers that the dog's mitochondria can use only fatty acids and amino acids for respiration, and his cells produce more lactate than normal. Of the following, which is the best explanation of the dog's condition?

TLS Online TPP Program

#Question id: 2559

#Unit 2. Cellular Organization

Even though plants cells carry out photosynthesis, they still use their mitochondria for oxidation of pyruvate. Under what conditions will plant cell mitochondria be active in this process?

TLS Online TPP Program

#Question id: 2560

#Unit 2. Cellular Organization

In a liver cell detoxifying alcohol and some other poisons, the enzymes of the peroxisome remove hydrogen from these molecules and ________.

TLS Online TPP Program

#Question id: 2561

#Unit 2. Cellular Organization

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle is most likely defective in this condition?