Biologists Examining the Plant Gene LEAFY's Effect on Expression Patterns

question 61

Multiple Choice

Biologists examining the plant gene LEAFY's effect on expression patterns of genes overexpressed and underexpressed LEAFY.They then performed microarray analysis to examine the effects of changes of LEAFY expression on the expression of other genes in the genome.Refer to the table showing the results for four different genes with LEAFY underexpressed and overexpressed, and the control.The expression levels are normalized such that they are 100 for each gene in control conditions. Which pattern is exhibited by gene 4419?

• A) As expression of LEAFY increases, the expression of gene 4419 also increases.
• B) As expression of LEAFY increases, the expression of gene 4419 decreases readily.
• C) Gene 4419 is most expressed when LEAFY is normally expressed; its expression decreases as LEAFY is either overexpressed or underexpressed.
• D) Gene 4419 is least expressed when LEAFY is normally expressed; its expression increases as LEAFY is either overexpressed or underexpressed.
• E) LEAFY has little or no effect on its expression.

---

Definitions:

Estrogen Level

The concentration of estrogen, a primary female sex hormone, in the body, which plays a crucial role in the development and regulation of the female reproductive system and secondary sex characteristics.

GnRH

Gonadotropin-releasing hormone, a neuropeptide that stimulates the production of gonadotropins, essential for reproductive functions.

Uterine Cycle

The monthly cycle of changes in the uterus, including menstruation, preparatory changes for potential pregnancy, and shedding of the uterine lining if pregnancy does not occur.

Reverse Transcriptase

An enzyme used by certain viruses, including retroviruses, to synthesize DNA from RNA.