Which, If Any, of the Following Descriptions Is False

question 37

Multiple Choice

Which, if any, of the following descriptions is false?

• A) Zinc fingers are elements of protein secondary structure in which the polypeptide chain folds back upon itself after co-ordination of a Zn²⁺ ion with selected amino acids, often a pair of cysteines and a pair of histidines.
• B) Zinc finger nucleases are natural proteins containing a sequence of zinc fingers that can bind to specific sequences in DNA.
• C) After zinc finger nucleases bind to both DNA strands at a specific DNA sequence they attract cellular DNA cleavage enzymes, inducing them to make a double-stranded break at just that one position in the genome.
• D) The CRISPR-Cas system also allows genome editing but in this case the target DNA sequences are recognized by guide RNA sequences rather than proteins.

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Definitions:

Genitals

The reproductive organs, especially those external to the body, such as the penis and vulva.

Involuntary Observers

Individuals who witness events or situations without choosing to do so, often leading to psychological distress or trauma.

Nonliving Objects

Items or materials that do not possess life, including inanimate objects and substances.

Sexual Arousal

The physiological and psychological state of being awakened to sexual desire and readiness for sexual activity.