Biology

point mutations can impair a protein if they result in which of the answer choices? select all that apply.
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5. Presented below are two models for the evolution of antibiotic resistance. Which model do you think ismore accurate? Justify your answer with evidence from the text or other sources.
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Where did coal get its energy?a. plants that absorbed the sun's energy millions of years agob. plants that absorbed the sun's energy hundreds of years agoc. plants that absorbed the sun's energy billions of years agod. plants that absorbed the sun's energy currently
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Which two of the following statements about protein synthesis are FALSE? Proteins are always translated as linear polypeptides, beginning from the amino terminus, but may be cleaved or joined afterward. The sequence of amino acids in a polypeptide is specified by ribosomal RNA. The sequence information in proteins can be transferred back into DNA by reverse transcriptase. According to the "sequence hypothesis", the structure and properties of a protein are determined by its primary amino-acid sequence. In eukaryotic cells, polypeptide synthesis takes place on ribosomes in the cytoplasm. Genes and the polypeptides they encode are colinear: that is, the order of missense mutations in a recombination map is the same as the order of the affected amino acids.
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Which of the following contains a plasma membrane receptor protein that interacts with antigen? Choose one:A. B cells onlyB. T cells onlyC. Both B cells and T cellsD. Neither B cells nor T cells
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what regulatory proteins can be found in the thin filaments of skeletal muscle fibers
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discuss the effects of ionizing radiation on cellular constituents
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which two organisms live in the most closely related ecological niches?
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What makes the central United States uniquely situated for getting supercell thunderstorms and large tornadoes? a. Lack of trees b. Flat terrain c. Strong winds O d. The fact that Arctic air can directly meet tropical air without any geographic impediment O e. Cold fronts
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Number the phrases below to show the correct sequence that lymph follows as itmoves through the lymph vessels. 3. _____________ The fluid between cells enters the lymph vessels and is nowcalled lymph. _____________ Blood leaves the heart and circulates to the rest of the body _____________ Filtered lymph leaves the lymph nodes and returns to thecirculatory system. _____________ Lymph circulates through the lymph vessels, moved by thepumping action of the bodys muscle contractions. _____________ Lymph passes through lymph nodes, where bacteria, viruses,fungi, and dead cell fragments are filtered out. _____________ Excess fluid leaks out of the capillaries and into the areabetween cells.
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how would the operation of the citric acid be changed to a rapid increase of [nadh]/[nad ] in the mitochondrial matrix?
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how did each condition affect the water ppotential gradient between the leaf tissue and the environment
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what is the homogeneous-good duopoly cournot equilibrium if the market demand function is.
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a metacentric chromosome is one that has a centerally located centromere and chromosome arms with approximately equal length. which of the human chromosomes are metacentric?
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Which of the following is a limit of evolution that results in exaptations? 64) A) Evolution is limited by historical constraints. B) Natural selection and sexual selection can work at cross purposes to each other. C) Adaptations are often compromises. D) Chance events affect the evolutionary history of populations in environments that can change unpredictably.
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why practical sciences is often left out by teachers ?
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Which of the following substances undergo renal tubular secretion? K+ KK H Y
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the leading hypothesis for delayed onset muscle soreness is/are:____
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In lungs there is definite exchange of ions betweenRBC and plasma. Removal of CO from blood involves
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explain how the flow of lymph is controlled through lymphatic vessels
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the major way that meiosis ii differs from mitosis is that multiple choice in meiosis ii, the homologues separate.
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burkholderia was reclassified from the gammaproteobacteria to the betaproteobacteria because
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which president advocated health care reform but never submitted a proposal to congress?
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relate explain how the terms exponentioal growth, logistic growth, and carrying capacity are related
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