Which of the Following Statements Are TRUE of the

question 37

Multiple Choice

Which of the following statements are TRUE of the 32 allele in the CCR5 gene?

• A)It codes for a mutant protein that is completely inactive.
• B)It is a deletion that maintains the reading frame.
• C)It provides some protection against HIV progression to AIDS in both its heterozygous and homozygous forms.
• D)It is an example of a beneficial mutation.
• E)It affects the attachment of HIV to an animal cell by altering one of the viral proteins.

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Definitions:

Modified Leaves

Structures in plants that have evolved to perform functions other than photosynthesis, such as protection or reproduction.

Meristematic Tissue

Plant tissue found in regions of growth, made up of actively dividing cells that give rise to various organs of the plant.

Bud Scales

Protective structures that cover the developing buds of many plants, shielding them from environmental stresses such as cold temperatures.

Guttation

The exudation of drops of water from the tips or edges of leaves, resulting from root pressure in certain plants.