Choose the Correct Answer from the List Below

question 27

Multiple Choice

Choose the correct answer from the list below. Not all of the answers will be used.
-The precursor for serine, cysteine, and glycine amino acid biosynthesis is _______________.

• A)atmospheric nitrogen (N₂)
• B)3-phosphoglycerate
• C)cumulative
• D)nitrogen fixation
• E)B₁₂
• F)histidine
• G)tetrahydrofolate
• H)committed
• I)pyridoxal phosphate
• J)enzyme multiplicity
• K)MoFe cofactor
• L)ammonia (NH₃)

---

Definitions:

Classical Conditioning

A learning process that occurs through associations between an environmental stimulus and a naturally occurring stimulus.

Rewards and Punishments

Incentives and consequences used to reinforce desired behavior and discourage unwanted behavior, respectively.

Gamification

The application of game-design elements and principles in non-game contexts to engage and motivate people to achieve their goals.

Mastery

A high level of skill or knowledge in a particular subject or activity.