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Questions in biology

[Done] The role of oncogenes in cancer cells is to: A. Maintain normal cell division B. Promote autonomous cell growth C. Repair DNA D. Suppress cell growth

[Done] Is the process of forming nonessential amino acids by transferring the nitrogen from one amino acid to a keto acid to form a new nonessential amino acid: A. Transamination B. Deamination C. Phosphorylation

[Done] What hormone is involved in the regulation of appetite? A. Leptin B. Steroids C. Neurohormones D. Ghrelin

[Done] Listen. The cell theory states: Choose all that apply. A. All organisms are composed of more than one cell. B. All cells come from existing cells. C. Cells are the basic unit of life. D. All organisms are composed of one or more cells.

[Done] Complete the following statements about the products of the Calvin cycle and their importance to heterotrophs by selecting the appropriate terms from the dropdown lists. 1. The Calvin cycle produces a very versatile chemical compound named (Click to select), which can be converted to many carbohydrates, as well as fatty acids and amino acids. Compared to animal cells, algae and plants have enormous (Click to select) capabilities. 2. One of the organic molecules produced from Calvin cycle products is (Click to select), which is the molecule most often metabolized to produce ATP. 3. Glucose phosphate can be combined with (Click to select) (and the phosphate removed) to form sucrose, the molecule plants use to transport carbohydrates from one part of the plant to the other. 4. Glucose phosphate is also the starting point for the synthesis of (Click to select), which is the storage form of glucose in plants. Some of this stored glucose is found in chloroplasts, but most is found in the (Click to select) of plants. 5. Glucose phosphate is used to build (Click to select), a structural component of plant cell walls that is called (Click to select) when ingested by humans, because we are unable to digest it. 6. A plant can use the hydrocarbon skeleton of G3P to form fatty acids and glycerol, which are combined in the familiar food products known as plant (Click to select). Also, when (Click to select) is added to the G3P hydrocarbon skeleton, amino acids are formed.

[Done] Which of the following is contained in the gamma globulin fraction of blood plasma? A. Antibodies B. Clotting factors

[Done] Which of the following are found on all nucleated cells of humans? MHC II molecules MHC I molecules APCS Macrophages

[Done] Transmission of information between the presynaptic neuron and the postsynaptic neuron is _______, while the action potential is A. electrical/chemical B. scientific/medical C. chemical/electrical D. medical / scientific

[Done] Aquatic organisms have only a predatory relationship with coral reefs. True or False?

[Done] Classify each of the following as a reactant or product of cellular respiration. 1. C6H12O6 2. 6 H₂O 3. 6 02 4. 6 CO₂