Figure 272 Depicts Changes to the Amount of DNA Present in in a Recipient

question 41

Multiple Choice

Figure 27.2 depicts changes to the amount of DNA present in a recipient cell that is engaged in conjugation with an Hfr cell. Hfr cell DNA begins entering the recipient cell at Time A. Assume that reciprocal crossing over occurs (in other words, a fragment of the recipient's chromosome is exchanged for a homologous fragment from the Hfr cell's DNA) . Use Figure 27.2 to answer the following questions.

Figure 27.2
-Which two processes are responsible for the shape of the curve at Time B?
1) transduction
2) entry of single-stranded Hfr DNA
3) rolling circle replication of single-stranded Hfr DNA
4) activation of DNA pumps in plasma membrane

• A) 1 and 2
• B) 1 and 4
• C) 2 and 3
• D) 2 and 4
• E) 3 and 4

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Definitions:

Exponential Growth

A growth pattern where the rate of increase is proportional to the current size, leading to faster and faster growth over time.

Cartilage

A type of flexible connective tissue found in various parts of the body including joints, ear, and nose.

Exocrine Glands

Glands that secrete substances onto an epithelial surface by way of a duct, examples include sweat, salivary and digestive glands.

Hormones

Substances synthesized by bodily glands that control the functions of cells or organs.