Nutritionally Variant Streptococci (Abiotrophia)

question 10

Multiple Choice

Nutritionally variant streptococci (Abiotrophia)

• A)require vitamin B6 for growth.
• B)will grow on 5% sheep blood agar.
• C)form satelliting colonies around Haemophilus species.
• D)require vitamin K for growth.

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Definitions:

Cytoplasm

The gel-like substance inside a cell, excluding the nucleus, containing organelles in which the cell's processes occur.

Activators

Proteins that bind to specific DNA sites to increase the likelihood of transcription of a particular gene.

Transcription

The act of transferring the encoded information from a DNA strand into a novel molecule of messenger RNA (mRNA).

RNA Interference

Mechanism in which RNA molecules interfere with gene expression by preventing translation of specific mRNAs.