If an Incoming Message Is Not Strong Enough to Cause

question 79

Multiple Choice

If an incoming message is not strong enough to cause a neuron to fire, it may cause a shift in the electrical charge of just a tiny area of the neuron. This shift, which quickly fades away, is called a(n) ________.

• A) resting potential
• B) action potential
• C) transitional polarization
• D) graded potential

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Definitions:

Codon

A sequence of three nucleotides in mRNA that specifies a particular amino acid or termination signal in the synthesis of proteins.

Amino Acid Coding

Amino acid coding involves the use of codons in mRNA to specify which amino acids will be added during protein synthesis.

MRNA

Messenger RNA, a single-stranded RNA molecule that is complementary to one of the DNA strands of a gene and is responsible for carrying genetic information from DNA to the ribosome where proteins are synthesized.

Codons

Sequences of three nucleotides in mRNA that specify the addition of a specific amino acid to a polypeptide chain during protein synthesis.