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. 

Treating all patients with the same precautions is the definition of which of the following?

 # Treating all patients with the same precautions is the definition of which of the following? 

a. Routine precautions. 

b. Standard or universal precautions. 

c. Patient-specific precautions. 

d. Procedure-specific precautions. 

The correct answer is B. Standard or universal precautions.

Standard or universal precautions are a set of infection control practices designed to prevent the transmission of infectious agents from patients to healthcare personnel and vice versa. The concept of standard precautions involves treating all patients as potentially infectious and using the same level of precautions for all patients, regardless of their diagnosis or presumed infection status. Standard precautions include practices such as hand hygiene, use of personal protective equipment (PPE), safe injection practices, respiratory hygiene and cough etiquette, and safe handling of potentially contaminated equipment and surfaces. The use of standard precautions is important for protecting both healthcare personnel and patients from the spread of infectious diseases. 

Routine precautions: This term is not commonly used in infection control, but it could refer to the general precautions that are routinely taken in healthcare settings to prevent the spread of infection. These precautions may include practices such as hand hygiene, disinfection of surfaces and equipment, and isolation of patients with infectious diseases.

Patient-specific precautions: This refers to infection control measures that are tailored to the specific needs and risks of individual patients. For example, a patient with a highly contagious respiratory illness may be placed in an airborne infection isolation room, which is a specific type of isolation room that is designed to prevent the spread of infectious agents through the air.

Procedure-specific precautions: This refers to infection control measures that are tailored to specific medical procedures. For example, a surgical procedure may require the use of sterile equipment and surgical attire, and the cleaning and disinfection of the surgical site before and after the procedure. Procedure-specific precautions are designed to prevent the transmission of infectious agents during the performance of specific procedures.

The classification of infection control depends on the procedure being performed and the risk of which of the following?

 # The classification of infection control depends on the procedure being performed and the risk of which of the following? 

a. Contamination. 

b. Disinfection. 

c. Transmission. 

d. Splatter. 

The correct answer is C. Transmission.

The classification of infection control measures depends on the procedure being performed and the risk of transmission of infectious agents. Infection control measures are designed to prevent the transmission of infectious agents, which can occur through various means, such as contact with contaminated surfaces or equipment, exposure to droplets or aerosols generated during procedures, or direct contact with infected patients. The classification of infection control measures takes into account the nature of the procedure being performed, the potential for exposure to infectious agents, and the level of risk associated with the procedure. The classification can range from standard precautions for low-risk procedures to transmission-based precautions for high-risk procedures.

Which of the following defines the processes and precautions that can be taken to control the spread of infection?

# Which of the following defines the processes and precautions that can be taken to control the spread of infection? 

a. Chemical disinfectant. 

b. Aseptic technique. 

c. Infection control. 

d. Surgery cleanliness. 

The correct answer is C. Infection control.

 Infection control refers to the measures and protocols designed to prevent and control the spread of infections in healthcare settings and other settings where people may be at risk of contracting infectious diseases. This can include practices such as hand hygiene, wearing personal protective equipment (PPE), isolating patients with infectious diseases, and disinfecting surfaces and equipment. Chemical disinfectants, aseptic technique, and surgery cleanliness are all important components of infection control, but they are specific methods or tools used to achieve the goal of controlling the spread of infection.