Which functional group is polar and a key component of alcohols?

a. carbonyl group
b. hydroxyl group
c. phosphate group
d. amino group
e. carboxyl group


B

Biology & Microbiology

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From what substance do liposomes spontaneously form and why are they important?

a. Liposomes spontaneously form from DNA and proteins and provide a rigid structure to support the cell. b. They are formed from phospholipid monolayers. These phospholipid monolayers provide a stable barrier between the internal and external environments. c. Liposomes were the first rigid cell walls providing support for the living cell and a barrier between the external and internal environments. d. Liposomes form from phospholipid bilayers and provide a barrier between an external environment and an internal environment; this creates an internal environment where specific chemical reactions needed to establish a living cell can occur separately from the external environment.

Biology & Microbiology

Which layer of the extracellular matrix of a plant provides the greatest strength?

A. the middle lamella B. the primary cell wall C. the secondary cell wall D. the plasma membrane

Biology & Microbiology

Which of the following are used by cyanobacteria for reproduction?

A. Fragmentation B. Binary fission C. Budding D. All of the choices are correct.

Biology & Microbiology

All groups of living organisms share several key characteristics or functions

What will be an ideal response?

Biology & Microbiology