nmdcat.online
BIO NMDCAT Proteins
nmdcat.online June 29, 2026

In living organisms, the classification of an amino acid as essential implies that it

A. Is the most abundant amino acid in protein structures
B. Can be synthesized by the body from metabolic intermediates
C. Cannot be synthesized de novo by the organism and must be obtained from the diet
✓
D. Functions exclusively as an enzyme cofactor

📝 Explanation

Essential amino acids lack the necessary biosynthetic pathways in the organism. For humans, there are nine essential amino acids (e.g., lysine, valine, phenylalanine). Non-essential amino acids can be synthesized from common metabolic intermediates.

📖 Additional Information

  • Is the most abundant amino acid in protein structures
  • Can be synthesized by the body from metabolic intermediates
  • Cannot be synthesized de novo by the organism and must be obtained from the diet
  • Functions exclusively as an enzyme cofactor

Essential amino acids lack the necessary biosynthetic pathways in the organism. For humans, there are nine essential amino acids (e.g., lysine, valine, phenylalanine). Non-essential amino acids can be synthesized from common metabolic intermediates.

🔗 Share This Question

Facebook Twitter LinkedIn WhatsApp

🧭 Navigate Questions

Previous Question

The fundamental structural feature common to all standard amino acids found in proteins is the presence of

Next Question

The characteristic feature of the peptide bond in a protein backbone is its

Back to All Questions

🔗 Related MCQs

An increase in the incidence of ectopic pregnancies within a population can often be epidemiologically correlated with a prior increase in the prevalence of which sexually transmitted disease?
July 16, 2026
In the life cycle of Herpes Simplex Virus 2 (HSV-2), the virus travels along nerve fibers to reach the sensory ganglia. The cellular mechanism responsible for this retrograde transport utilizes:
July 16, 2026
A defining characteristic of the lesions associated with the secondary stage of syphilis is that they:
July 16, 2026
The causative agent of genital herpes, HSV-2, is enveloped. The biological significance of this viral envelope in the context of transmission is that it makes the virus:
July 16, 2026
The structural basis for the severe cardiovascular complications seen in tertiary syphilis, such as aortic aneurysms, is the chronic inflammation and destruction of:
July 16, 2026

Categories

View all →