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. The major functions of the plasma membrane do NOT include A. separation of the fluid environments inside and outside the cell.B. regulation of molecules and ions that pass into and out of the cell.C. recognition and communication between different cells and tissues.D. maintaining connections between adjacent cells.E. production of proteins used in construction of the cell wall.

The _____ charge of a proton is exactly balanced by the _____ charge of a(an) _____ A. Negative; positive; electron B. Positive; neutral; neutron C. Positive; negative; electron D. Neutral; negative; electron

The second shell of atom can hold a maximum of____electrons a. two b. four c. eight d. sixteen

Bonus question

Bonus   Which is NOT true of eukaryotic cells? A. A true nucleus contains the chromosomes.B. Eukaryotic cells contain membrane-bounded compartments.C. They contain ribosomes that are smaller than those of prokaryotic cells.D. They all contain mitochondria.E. They contain many organelles in the cytoplasm.

Which of the following help in defending humans against disease? A. immunoglobulins (antibodies)B. lysosomesC. peroxisomesD. All of the choices help defend against disease.

Glycogen is to animal cells as ________ is to plant cells. A. lipid B. cellulose C. starch D. protein E. sugar

Which of the following monomers is NOT correctly matched with an appropriate corresponding polymer? A)amino acid—starch B)nucleotide—DNA C)monosaccharide—glycogen D)nucleotide—RNA E)all of these are correctly matched.

Why is ATP important in living organisms?a. It is easily converted to starch for long-term storage.b. It can transfer some of its energy to other chemicals.c. It is an important structural component of cell membranes.d. Like all other nucleic acids, it stores hereditary information.e. Like RNA, it acts as a source code for the formation of proteins.

The organelle that best enables an athlete’s tissues to be metabolically active are A. ribosomes.B. lysosomes.C. smooth endoplasmic reticulum.D. mitochondria.E. contractile vacuoles.