The Accompanying Figure Relates to the Synthesis of Thyroid Hormones

question 225

Multiple Choice

The accompanying figure relates to the synthesis of thyroid hormones. The basic steps in the reflex are labeled in the diagram 1-8b. Match the steps with the descriptions using the key below.
-Coupling of one MIT and one DIT yields T3

• A)Step 1
• B)Step 2
• C)Step 3
• D)Step 4a
• E)Sep 4b
• F)Step 5a
• G)Step 5b
• H)Step 6
• I)Step 7
• J)Step 8a
• K)Step 8b

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Definitions:

Quantitative Trait Locus

A section of DNA (locus) that correlates with variation in a quantitative trait in the phenotype of a population.

Stretch of DNA

A sequence of DNA nucleotides that constitutes a specific locus or region on a chromosome, often containing genes and regulatory elements.

Phenotypic Trait

Any observable characteristic of an organism, such as its morphology, development, biochemical or physiological properties, or behavior.

Genetic Mutation

A change in the DNA sequence that may result in the alteration of genetic function or expression.