DAT Biology Final Exam Study Set 2024/2025 with Verified Q&A

Carotenoids - CORRECT ANSWER-lipid derivatives, produce pigments in plants and animals , An accessory pigment, either yellow or orange, in the chloroplasts of plants. By absorbing wavelengths of light that chlorophyll cannot, carotenoids broaden the spectrum of colors that can drive photosynthesis. Porphyrins - CORRECT ANSWER-lipid derivatives, a group of light-sensitive, pigmented, ringed chemical structures that are required for the synthesis of hemoglobin. Complexed with metals usch as iron in hemoglobin and chlorophyll with Mg Can H20 and hydrocarbons pass freely across membrane? - CORRECT ANSWER-yes (small, uncharged, non-polar, hydrophobic can pass) Porins - CORRECT ANSWER-allow passage of certain ions and small polar molecules such as aquaporins in kidneys for H20 Rough ER - CORRECT ANSWER-protein synthesis, creates glycoproteins for secretion Smooth ER - CORRECT ANSWER-synthesis of hormones, lipids, breakdown of toxins and drugs in liver cyclosis - CORRECT ANSWER-transport of material in cytoplasm (steaming movement) Peroxiomes - CORRECT ANSWER-breakdown of H2O2, fatty acids, AA. In liver and kidneys to break down toxins, by-products of photorespiration in plants Centrioles - CORRECT ANSWER-two tiny structures located in the cytoplasm of animal cells near the nuclear envelope; play a role in cell division. Are microtubles (MTOCs) Storage vocuoles - CORRECT ANSWER-store starch, pigments, toxic substances (nicotine) in plants Contractile vacuoles - CORRECT ANSWER-in single cell organism, pump excess water out of cell Ex. fresh water protozoa to prevent bursting Desmosome - CORRECT ANSWER-aka spot welding, support and stability Tight junctions - CORRECT ANSWER-animal cells, seal to prevent passage of materials btwn cell gap junctions - CORRECT ANSWER-narrow tunnels btwn animal cells, only ions exchange plasmodesma - CORRECT ANSWER-barr