Answer the questions below. When you are finished, submit this test to your teacher for full credit. Total score: of 15 points (Score for Question 1: ___ of 5 points) What is the product of 1/2x-1/4 and 5x^2 -2x+6? Write your answer in standard form. (a) Show your work. (b) Is the product of 1/2x-1/4 and 5x^2 -2x+6 equal to the product of 1/4x- 1/2 and 5x^2 -2x+6? Explain your answer.

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.

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