Use the Following Information to Answer the Questions Below

question 12

Multiple Choice

Use the following information to answer the questions below.
A young animal has never had much energy. He is brought to a veterinarian for help and is sent to the animal hospital for some tests. There they discover his 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 his condition?

• A)His mitochondria lack the transport protein that moves pyruvate across the outer mitochondrial membrane.
• B)His cells cannot move NADH from glycolysis into the mitochondria.
• C)His cells contain something that inhibits oxygen use in his mitochondria.
• D)His cells lack the enzyme in glycolysis that forms pyruvate.
• E)His cells have a defective electron transport chain, so glucose goes to lactate instead of to acetyl CoA.

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Definitions:

Phenotypic Expression

Phenotypic expression is the observable physical and physiological traits of an organism resulting from the interaction of its genetic makeup with the environment.

Heterozygous

Having two different alleles for a particular gene, one inherited from each parent.

Allelic Form

Variations of a gene that occur in the same place on a chromosome.

Recessive Allele

An allele that produces its characteristic phenotype only when its paired allele is identical.