Question: Which of the following is not a component of DNA
Answer Choices:
Uracil
Adenine
Cytosine
Guanine
Thymine
Answer: Uracil
Question: In this lab exercise, protein content of a solution is measured using this assay.
Answer Choices:
Protease assay
Biuret assay
Bicinchoninic acid (BCA) assay
PCR assay
Answer: Biuret assay
Question: Km represents the…
Answer Choices:
formation of ES
formation of EP
the back reaction of product to ES
Kcat
Answer: the back reaction of product to ES
Question: Local folding of a protein occurs at what defined level of protein folding?
Answer Choices:
Primary
Secondary
Tertiary
Quaternary
All of the above
Answer: Tertiary
Question: Foods yield different amounts of energy based on their composition. How many kcal are obtained from one gram of carbohydrate?
Answer: 4 kcal
Question: The four most abundant chemical elements in living systems are:
Answer Choices:
Hydrogen, carbon, nitrogen and oxygen.
Sodium, potassium, nitrogen and sulfur.
Hydrogen, oxygen, sulfur and phosphorus.
Carbon, nitrogen, oxygen and potassium.
Sodium, potassium, carbon and oxygen.
Answer: Hydrogen, carbon, nitrogen and oxygen.
Question: What is the function of a lyase enzyme?
Answer Choices:
To assist the substrate by binding to the enzyme, enabling substrate to achieve site engagement
To facilitate a reaction of one substrate to form new products with the use of water
To facilitate a reaction of one substrate to form two products without the use of water
To flip this
Answer: To facilitate a reaction of one substrate to form two products without the use of water
Question: The ratio of the apparent size of an object as seen through the microscope (image size) to the real size of the object (object size) is referred to as:
Answer Choices:
Close Proximity
Linear Dimension
Magnification
Resolution
Answer: Magnification
Question: The ability of the microscope to distinguish as separate and distinct, objects that lie in close proximity is termed:
Answer Choices:
Linear Extension
Magnification
Resolution
Close Proximity
Answer: Resolution
Question: Glycogen is:
Answer Choices:
Main energy storage molecule of animals
Main carbohydrate reserve of animals
Main carbohydrate found in seeds
A form of plant starch
Answer: Both A and B are correct
Question: Carbohydrate is thought to enhance the stability of protein molecules by:
Answer Choices:
Changing the protein’s shape to better resist denaturation.
Protecting the underlying protein from the action of proteolytic enzymes.
Linking hydrogen bonding to increase the stability of the protein.
Answer: Both A and B are correct
Question: A sample that absorbs all wavelengths of the spectrum will appear _____.
Answer Choices:
Blue
White
Black
Yellow
Answer: Black
Question: Which of the following reactions has an oxidized product?
Answer Choices:
Carboxylic acid to aldehyde
R-SH + R’-S-S-R’ to R-SS-R
Alcohol to ketone
Glutamate to α-ketoglutarate
None of the above are correct
Answer: Alcohol to ketone