A change in a nucleotide sequence that results in addition or deletion of a single nucleotide and largely changes the amino acid sequence of the resulting peptide is known as a

A) nonsense mutation.
B) silent mutation.
C) missense mutation.
D) frameshift mutation.
E) none of the above


D) frameshift mutation.

Biology & Microbiology

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Photoreceptors that detect dim light are called ________ cells

a. cone b. amacrine c. rod d. horizontal

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Which type of plant hormone would be used by commercial grape growers to get larger grapes by

lengthening the stem on which fruits develop?

a. abscisic acid b. ethylene c. auxins d. salicylic acid e. gibberellins

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The double-layered membrane that covers the lungs is the ____

a. periosteum b. pericardial membrane c. peritoneal membrane d. pleural membrane e. intercostal membrane

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____ is/are associated with ribosomes. 

A. Cilia and flagella B. Golgi apparatus C. Smooth endoplasmic reticulum D. Rough endoplasmic reticulum

Biology & Microbiology