A hemoglobin molecule is formed when four independent proteins interact with one another; hemoglobin demonstrates the _____ level of protein organization.

A) primary
B) secondary
C) tertiary
D) quaternary
E) pentary


Answer: D) quaternary

Biology & Microbiology

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____________________ is the branch of genetics that is used to map genes and study chromosome structure and abnormalities in chromosome number and organization

Fill in the blank(s) with correct word

Biology & Microbiology

The membrane potential refers to the ____ across a cell membrane

a. difference in water concentration b. charge difference c. rate of movement d. distance e. difference in salt concentration

Biology & Microbiology

Which of the following is an accessory organ of the human digestive system?

a. salivary gland

b. esophagus c. stomach d. small intestine e. large intestine

Biology & Microbiology

Trypsin and elastase are both enzymes that catalyze hydrolysis of peptide bonds. But trypsin only cuts next to lysine and elastase only cuts next to alanine. Why?

What will be an ideal response?

Biology & Microbiology