Interview Questions and Answers

A nutritional label is a list of information about the nutritional content of a food product, including calories, fats, sugars, and vitamins.

• Provides information on serving size and number of servings per container

• Lists the amount of calories, fats, sugars, proteins, and other nutrients per serving

• Helps consumers make informed decisions about their dietary choices

• Required by law on most packaged food products

• Example: A nutritional label on a box of cereal will show the amount...read more

Biological Oxygen Demand (BOD) is a measure of the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a water sample.

• BOD is used as an indicator of the organic quality of water.

• High BOD levels indicate high levels of organic pollution in water bodies.

• BOD is measured over a specific period of time, usually 5 days (BOD5).

• It is an important parameter in assessing the health of aquatic ecosystems.

The pH scale ranges from 0 to 14, with 7 being neutral, below 7 acidic, and above 7 alkaline.

• pH scale ranges from 0 to 14

• 7 is considered neutral on the pH scale

• Below 7 is acidic, above 7 is alkaline

• Examples: Lemon juice has a pH of around 2, pure water has a pH of 7, and baking soda has a pH of around 9

I am currently performing sample preparation by extracting DNA from blood samples and processing around 20 samples per day.

• Performing DNA extraction from blood samples

• Processing approximately 20 samples per day

• Utilizing various techniques such as PCR and gel electrophoresis

Acids are substances that have a pH level lower than 7, taste sour, and can react with metals to produce hydrogen gas.

• Acids have a pH level lower than 7

• Acids taste sour

• Acids can react with metals to produce hydrogen gas

ppm stands for parts per million, a unit of measurement used to express very small concentrations of substances in a mixture.

• ppm is a unit of measurement used to represent the ratio of one part of a substance to one million parts of a mixture.

• It is commonly used in fields such as chemistry, environmental science, and engineering to express very small concentrations of substances.

• For example, if a water sample contains 5 ppm of a certain chemical, it means there are 5 parts of...read more

Some examples of heavy metals include lead, mercury, cadmium, arsenic, and chromium.

• Lead

• Mercury

• Cadmium

• Arsenic

• Chromium