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

Membrane-bounded vesicles that contain enzymes for oxidizing small organic molecules with the formation of hydrogen peroxide are A. vacuoles.B. vesicles.C. glyoxisomes.D. lysosomes.E. peroxisomes.

Cell structures that function in cell division are A. Golgi bodies.B. ribosomes.C. granules.D. centrioles.

. 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.

Carbon-12, Carbon-13 and Carbon-14 are examples of _______________. A. radioactivity B. isotopes C. isomers D. molecules

The phospholipids of a cellular membrane will have their ____ ends facing each other (inside) and their ____ ends facing away from each other (outside). A. hypotonic, hypertonicB. hypertonic, hypotonicC. hydrophilic, hydrophobicD. hydrophobic, hydrophilic  

Which one of the following properties is not a characteristic of all living organisms? a. Maintenance of relatively stable internal conditions b. Adaptation to environmental factors in ways that influence survival c. Production of nutrients by photosynthesis d. Growth and reproduction e. Response to stimuli

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

Microfilaments such as actin, microtubules, and the intermediate filaments form the cell-supporting structure called the ______________. A. cytoplasm B. plasma membrane C. cytoskeleton D. centrioles

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.