Use the Following Information to Answer the Next Few Questions

question 55

Multiple Choice

Use the following information to answer the next few questions.
CML (chronic myelogenous leukemia) results from a translocation between human chromosomes 9 and 22. The resulting chromosome 22 is significantly shorter than usual, and it is known as a Philadelphia (Ph') chromosome. The junction at the site of the translocation causes overexpression of a thymine kinase receptor. A new drug (Gleevec or imatinib) has been found to inhibit the disease if the patient is treated early.
-One possible use of transgenic plants is in the production of human proteins, such as vaccines. Which of the following is a possible hindrance that must be overcome?

• A) prevention of transmission of plant allergens to the vaccine recipients
• B) prevention of vaccine-containing plants being consumed by insects
• C) use of plant cells to translate non-plant-derived mRNA
• D) inability of the human digestive system to accept plant-derived protein
• E) the need to cook all such plants before consuming them

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Definitions:

Transposon

A DNA segment that is capable of moving from one chromosome to another or to different sites within the same chromosome; also called a mobile genetic element.

DNA Sequence

The precise order of nucleotides within a DNA molecule, determining genetic instructions for the development and functioning of living organisms.

Gene

A unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

RNA Nucleotides

The basic structural units of RNA, composed of a nitrogenous base, a ribose sugar, and a phosphate group.