You Are Working in a Lab That Studies Tobacco Mosaic

question 12

Multiple Choice

You are working in a lab that studies tobacco mosaic virus (TMV) . You wish to perform follow up experiments to the Fraenkel-Conrat/Singer experiments. You use the Holmes ribgrass (HR) strain of TMV that they used, which produces streaks along the veins and contains histidine and methionine in the TMV capsid protein. You also use a second TMV strain that you've isolated, called Purp, that causes purple lesions on the leaves, and lacks histidine and methionine in the TMV capsid protein. If you use Purp RNA and HR proteins to create reconstituted viruses, what lesions do you expect will form, and what will the amino acid composition of the capsid protein be?

• A) Purple lesions, histidine and methionine in the capsid protein
• B) Purple lesions, no histidine and methionine in the capsid protein
• C) Streaks on the veins, no histidine and methionine in the capsid protein
• D) Streaks on the veins, histidine and methionine in the capsid protein

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Definitions:

Breast Tumors

Abnormal growths in breast tissue, which can be benign (non-cancerous) or malignant (cancerous).

Weight

A measurement of the heaviness or mass of a person or object, influenced by the force of gravity.

Dense Breasts

A condition where breasts have less fatty tissue and more glandular and fibrous tissue, observed in mammograms.

Breast Cancer

A type of cancer originating from breast tissue, characterized by the uncontrolled growth of breast cells and commonly detected via lumps, imaging tests, or changes in breast appearance.