What is the principal energy storage molecules of plants and animals?
A. sugars.
B. proteins.
C. lipids.
D. vitamins.
E. carbohydrates.
Ans: E. carbohydrates.
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In bacterial synthesis of polysaccharides, such as starch and glycogen, glucose is donated to the end of the growing chain by ADP-glucose. A similar reaction occurs in bacterial branching of phospholipids when phosphatidic acid is attached to a ________.
A. dihydroxyacetone phosphate B. fatty acyl-ATP C. acetyl-CoA D. cytidine diphosphate carrier
The mitotic spindle is primarily composed of ____
a. actin b. intermediate filaments c. microtubules d. keratin e. motor proteins
Bacteria in the colon protect people from some infections.?
Indicate whether the statement is true or false.
Which of the following is NOT true about IgG type antibodies?
a. It is the most common/abundant type of antibody in the blood b. It is the most common/abundant type of antibody in body secretions c. It can cross the placenta and protect the fetus. d. It is the longest lasting type of antibody produced.