An Uncatalyzed Reaction Has a Rate of 4

question 46

Multiple Choice

An uncatalyzed reaction has a rate of 4.2 × 10^-7 sec^-1.When an enzyme is added the rate is 3.2 × 10⁴ sec^-1.Calculate the rate enhancement caused by the enzyme.

• A)3)2 × 10⁴
• B)7)4 × 10^-3
• C)1)3 × 10^-2
• D)7)6 × 10¹⁰
• E)The data are not appropriate for the calculation requested.

Understand the role of protein kinases in signal transduction and how their cascades amplify cellular signals.

Recognize the effects of ligand concentration and receptor-binding affinity on signaling pathways.

Explain how intracellular receptors function and how they can alter gene expression.

Understand the methods used to investigate the involvement of receptors in responding to external signals.

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Definitions:

Lateral Border

The side edge or boundary of an anatomical structure or organ.

Proximal Phalanx

The proximal phalanx refers to the bone in the finger or toe that is closest to the hand or foot, forming part of the skeletal structure of each digit.

Distal Phalanx

The bone at the tip of a finger or toe, farthest from the body's main structure.

Metacarpal

The metacarpal bones are the five long bones in the hand that connect the wrist to the fingers.