Numerade

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e: 494/750 Question Value Why do many paper towels (which contain high levels of cellulose) often fall apart when wet with water? Water disrupts the hydrophobic interactions holding the cellulose particles together. Water slowly dissolves the cellulose, making a colloidal suspension. Water competes for the hydrogen bonding between cellulose molecules. Water protonates the $$-OH$$ groups on cellulose causing them to repel.

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6. (2 pts each-22pts total) For the following genotypes of E. coli strains, state whether enzyme activity is inducible (I), constitutive (C), or uninducible (U). Key to symbols in table: z = structural gene for β-galactosidase y = structural gene for permease a = structural gene for transacetylase p = promoter (for lac operon) i = structural gene for the lac repressor (regulator gene) o = operator (binding site for repressor) Genotype i+ p+ o z y a+ i p+ o+ z+ y a/ i+ p- oc z-y+ a i p* o+ z* ya*/ i+ p+ o z y+ a- i+ p+ o+ zya+ i po+z+ya+/ i po z y a i po z ya i- p+ o+ z+ y a+/ i+ p o z-y+ a- is p+ o+ z y+ a*/ i+ p+ o z+ y a i po+z+ya+/ i po zya is p+ o z+ y a+ i* p* o z y a β-gal (z) Permease (y) Transacetylase (a) 3 28

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Which part of a check is optional to fill out? Multiple choice A. payee B. Memo C. date D. Signature

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Which of the following is an example of person-first language? Marilyn is an older adult. Damien is handicapped. Jada is a schizophrenic. Libby is bipolar.

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True or False? Genes exist in pairs, and the members of each pair are located at corresponding sites (gene loci) on homologous chromosomes.

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A kindergarten teacher is working with a small group of students on adding single digit numbers. She shows students the problem 3 + 5, then counts out and attaches a set of three unifix cubes and a set of five unifix cubes. She then joins the sets of unifix cubes together, counts the total of eight unifix cubes, and writes 3 + 5 = 8. Next, she gives each student in the group a set of unifix cubes and writes the problem 4 + 2. The teacher models how to count and attach a set of four cubes and a set of two cubes, join the two sets together, and count to find the total of six. While she models this, students do the same with their unifix cubes. Finally, the teacher writes 3 + 4 and has students count and attach their cubes independently while she observes them.Based on this description, what strategy is the teacher using?

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$ { }_{\text {and }}^{B C D} $ is a parallelogram. $ \mathrm{BE} \perp \mathrm{AC} $ op arallelogram $ P Q R S $ is a square. The diagonals intersect $ { }_{\text {at }} E $. $ P A=B S $. Prove that $ \triangle A E B $ is an isosceles triangle.

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f'(x) = If f(x) = \frac{3x-4}{x^3}, then :Select one -6x^{-3} + 12x^{-4} .a x^{-2} .b \frac{3x-4}{x^3} .c

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Evaluate the following integral in cylindrical coordinates: \begin{equation*} \int_{-1}^{1} \int_{-\sqrt{1-y^2}}^{\sqrt{1-y^2}} \int_{-1}^{1} (x^2 + y^2)^{\frac{3}{2}} dzdxdy \end{equation*} Value = 0 Incorrect. How do you convert a function into cylindrical coordinates?

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A line segment of length 2 has its one end at the point (2,5) and makes an angle of \theta with horizontal. What value of \theta will result in the largest surface area when the line segment is rotated about the x axis. Explain your reasoning

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vanesa k.