A Magnifying Lens with a Focal Length of 30

question 32

Multiple Choice

A magnifying lens with a focal length of 30.0 cm has what maximum magnification? (Assume the near point is 25 cm) .

• A)2.2
• B)0.8
• C)31.0
• D)1.8
• E)​30.0

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Definitions:

Cyclic AMP

A secondary messenger important in many biological processes, formed from ATP by the action of adenylyl cyclase.

Second Messenger

A substance (e.g., cyclic AMP or calcium ions) that relays a message from a signaling molecule (the first messenger) bound to a cell-surface receptor; leads to some change in the cell.

Protein Kinase A

An enzyme that transfers phosphate groups from ATP to specific proteins, playing a key role in the regulation of cellular processes.

Tyrosine Kinases

A family of enzymes that catalyze the transfer of a phosphate group from ATP to a tyrosine residue in a protein, playing key roles in signal transduction pathways.