Figure 7-1 Structural Components of a Skeletal Muscle Fiber

question 35

Multiple Choice

Figure 7-1 Structural Components of a Skeletal Muscle Fiber
Use Figure 7-1 to identify the labeled part.
-The triad, seen as structure D, is composed of

• A) the T tubules and the myofibrils.
• B) actin and myosin.
• C) troponin and tropomyosin.
• D) the cisterna of the sarcoplasmic reticulum along with the T tubules.
• E) the cisterna of the sarcoplasmic reticulum and the myofilaments.

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Definitions:

Coding Region

A portion of a gene's DNA or RNA that codes for protein.

AUG

The codon in messenger RNA that signals the start of translation and the amino acid methionine.

UAA

One of the three stop codons in the genetic code that signals the end of protein synthesis.

Eukaryotic Transcripts

The RNA molecules resulting from transcription in eukaryotic cells, including both coding mRNA and non-coding RNA.