MCQs on Protein Metabolism - Biochemistry MCQs

# Tertiary structure of proteins is maintained by all except:
A. H2 bond
B. Hydrophobic
C. Ionic bond
D. Disulphide bond
E. None of the above

# Which of the following is a derived protein?
A. Protamines
B. Peptones
C. Prolamines
D. Lactalbumin

Which of the following is the general term for the complex microbial community that develops on the tooth surface?

 # Which of the following is the general term for the complex microbial community that develops on the tooth surface? 

a. Calculus. 

b. Saliva. 

c. Dental plaque. 

d. Dental stain. 

The correct answer is C. Dental Plaque. 

Dental plaque is the general term for the complex microbial community that develops on the tooth surface. Plaque is a soft, sticky film that forms on the teeth and can lead to dental caries and gum disease if not removed through proper oral hygiene practices, such as brushing and flossing. Calculus (also known as tartar) is a hard mineral deposit that can form on the teeth when plaque is not removed, and it can contribute to gum disease. Saliva is a fluid that helps to protect the teeth and oral tissues from infection, but it is not the same as dental plaque. Dental stain refers to discoloration of the teeth that can be caused by various factors, such as smoking, drinking coffee or tea, or poor oral hygiene.

Herpes simplex type 1 virus can be transmitted in dentistry by which of the following?

 # Herpes simplex type 1 virus can be transmitted in dentistry by which of the following? 

a. Sharps injury. 

b. Contact with skin. 

c. Inhalation of infected droplets. 

d. Contact of infected material with skin or eyes 

The correct answer is D. Contact of infected material with skin or eyes 

Herpes simplex type 1 virus can be transmitted in dentistry through direct contact with infected oral secretions or lesions, such as through contaminated instruments or gloves, or through accidental exposure to infected material during dental procedures. It is important for dental healthcare personnel to use standard precautions, such as wearing gloves and eye protection, to minimize the risk of transmission of herpes simplex virus and other infectious agents. Sharps injury and inhalation of infected droplets are not routes of transmission for herpes simplex virus, and while contact with skin may be a route of transmission, contact with infected oral secretions or lesions is a more likely mode of transmission in a dental setting.

HIV infection can be transmitted in dentistry by which of the following?

 # HIV infection can be transmitted in dentistry by which of the following? 

a. Inhalation of infected droplets. 

b. Contact with contaminated dental unit water supplies. 

c. Contact with skin. 

d. Use of infected instruments. 

The correct answer is D. Use of infected instruments. 

HIV infection can be transmitted in dentistry by the use of contaminated instruments, such as needles, dental handpieces, and other reusable instruments that are not properly sterilized. While the risk of transmission of HIV in dentistry is low, it is important for dental healthcare personnel to follow standard precautions, including proper sterilization of instruments and use of personal protective equipment, to prevent the transmission of HIV and other infectious agents. HIV is not transmitted through inhalation of infected droplets, contact with skin, or contact with contaminated dental unit water supplies, although these can be routes of transmission for other infectious agents.