The Signal Sequences That Direct Proteins to the Nucleus Are

question 22

Multiple Choice

The signal sequences that direct proteins to the nucleus are:

• A) always at the amino terminus of the targeted protein.
• B) cleaved after the protein arrives in the nucleus.
• C) glycosyl moieties containing mannose 6-phosphate residues.
• D) not located at the ends of the peptide, but in its interior.
• E) the same as those that direct certain proteins to lysosomes.

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Definitions:

Conjoined Twins

Twins that are physically connected to one another at birth, resulting from the incomplete separation of twin embryos during pregnancy.

Fertilization

The process in sexual reproduction where a sperm cell unites with an egg cell, leading to the formation of a zygote.

Sperm

The male sex cell.

Ovum

The female reproductive cell or egg, which when fertilized by a sperm, can develop into a new organism.