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Posted: November 11th, 2019
11. The building blocks of proteins areA. fatty acidsB. amino acidsC. nucleotidesD. carbohydrates12. A biochemist measures the amount of DNA in cells growing in the laboratory. The quantity of DNA in a cell would be found to doubleA) between prophase and anaphase in mitosisB) between the G1 and G2 phases of the cell cycleC) during the M phase of the cell cycleD) between prophase I and prophase II13. The bond in which 2 atoms share one or more pairs of electrons is a ______________ bond. A) polar B) hydrogen C) ionic D) covalent14. The energy required for photosynthesis is provided by? A) proteins B) sunlight C) chlorophyll D) carbohydrates E) lipids15. The term below that includes the other terms is A) atom B) molecule C) electron D) element16. An element has 43 protons and 50 neutrons. The atomic number of the element is A) 43 B) 50 C) 86 D) 93 E) 10017. The diffusion of water through a selectively permeable membrane is called ______.A) facilitated diffusion B) active transport C) osmosis D) phagocytosisE) endocytosis18. A dog gets many nutrients from its food including amino acids. Which of these can be built directly using the amino acids? A) proteins B) carbohydrates C) lipids D) nucleic acids E) glucose19. Most carbohydrates in the human body are ___________________________. A) used as building blocks for proteins B) used as catalysts for reactions in cells C) consumed as a source of energy D) not easily absorbed into the bloodstream E) not necessary for regular bodily functions20. A scientist removed the plasma membranes from bacteria cells in a culture. She analyzed the cell membranes for specific molecules. Which of these was probably the most common type of molecule present in the bacteria plasma membranes? A) carbohydrate B) nucleic acid C) amino acid D) lipid E) ATP
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