A particular peptide has the following amino acid composition of (Lys, Phe, Met, Asp and Thr). The following experimental observations have been made. Trypsin yields 2 peptides with composition (Lys, Met, Asp) and (Thr, Phe) Cyanogen bromide cleavage gives 2 peptides with composition (Met, Asp) and (Lys, Thr, Phe). Chymotrypsin give 2 peptides with composition (Lys, Met, Phe, Asp) and (Thr). Trypsin cleaves at the C-terminus of Arg and Lys. Chymotrypsin cleaves at the C-terminus of aromatic residues. Cyanogen bromide cleaves at the C-terminus of Met. What is the amino acid sequence

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms

How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.