Hester Biosciences QC Officer Interview Questions and Answers

Acid and base are two types of chemical compounds with distinct properties.

• Acids are substances that release hydrogen ions (H+) when dissolved in water.

• Bases are substances that release hydroxide ions (OH-) when dissolved in water.

• Acids have a sour taste and can corrode metals.

• Bases have a bitter taste and feel slippery to the touch.

• Examples of acids include hydrochloric acid (HCl) and sulfuric acid (H2SO4).

• Examples of...read more

The pH formula is used to calculate the acidity or alkalinity of a solution. Molarity is a measure of the concentration of a solute in a solution. The pH scale is a logarithmic scale that ranges from 0 to 14, with 7 being neutral.

• pH formula calculates the negative logarithm of the hydrogen ion concentration in a solution

• Molarity is the number of moles of solute per liter of solution

• The pH scale ranges from 0 to 14, wit...read more

Environment monitoring in QC microbiology involves regular sampling and testing of the manufacturing environment to ensure cleanliness and control of microbial contamination.

• Sampling of air, surfaces, and water sources

• Use of agar plates, swabs, or settle plates for collection

• Incubation of samples to allow microbial growth

• Identification and enumeration of microbial colonies

• Analysis of results to assess the level of cont...read more

Surface monitoring is a process of regularly testing and evaluating the cleanliness and microbial contamination levels on surfaces in a controlled environment.

• Surface monitoring involves taking samples from various surfaces, such as equipment, workstations, and cleanrooms.

• These samples are then analyzed for the presence of microorganisms, such as bacteria, fungi, and viruses.

• Surface monitoring helps to ensure that the ...read more

Negotiable on CTC depends on the company's policies and the candidate's experience and skills.

• CTC negotiation is common in the industry.

• The company may have a fixed salary structure or may be open to negotiation.

• The candidate's experience and skills can influence the negotiation.

• Other benefits like health insurance, bonuses, and vacation time can also be negotiated.

• It's important to research industry standards and comp