Dat biology actual exam - Study guides, Class notes & Summaries

Cyclic AMP - A secondary messenger important in many biological processes. It is a derivative of ATP and is used for intracellular signal transduction in many organisms. Which is a secondary messenger? - Cyclic AMP Plasmid - Small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA. Naturally exist in bacterial cells, but occur in some eukaryotes. Carry genes (act as vehicle) that provide bacteria with genetic advantages, such as antibiotic resistance.

Describe Cell Theory - a.All living things are composed of cells b.Cells can only develop from pre-existing cells c.Cells are the smallest unit of life d.Cells carry their genetic information in the form of DNA (T/F) Electron microscopy can be used for the study of live specimens. - False . What type of laboratory method can be used to spate cells without destroying them? - Filtration, Centrifuge

Transformation - Integration of a foreign chromosome fragment (plasmid) into the host genome Gametic Isolation - When two closely related species share the same habitat, but the sperm of one species cannot fertilize the egg of the other species, and vice versa. Pancreas Enzymes - Carboxypeptidase, chymotrypsin, lipase, and trypsin Mineralcorticoids - Promote the retention of water, sometimes through the retention of minerals. i.e Aldosterone, which promotes the retention of sodium

DAT Biology Actual Exam Solved with Complete Verified Answers

Action potential - If threshold level of Na+ is reached/exceeded it will result in the opening of the voltage gated Na+ channels down the entire length of the neuron. All or nothing event. As stimulus intensity increases, the amplitude and speed of the action potential...? - Remain constant How is amplitude of an action potential affected by frequency? - It is not affected. Action potentials increase as intensity of stimulus increases? - TRUE. As stimulus intensity increases, the # of acti...

DAT Biology Actual Exam with Complete Verified Answers