Part I Macromolecules Matching. a. dehydration reaction b hydrolysis c. cellulos

Question

Part I Macromolecules Matching. a. dehydration reaction b hydrolysis c. cellulose d. starch e. sucrose 1. Disaccharide consisting of glucose and fructose 2. Polysaccharide consisting of only glucose subunits: storage form of glucose in plants 3. Process by which most disaccharides and polysaccharides can be broken down into their monosaccharides a. HCl b. I_2 KI c. Benedict's reagent d. Biuret e. glucose 4 Used to test for the presence of proteins 5. Used to test for the presence of monosaccharides (small sugars) 6 Used to test for the presence of starch Which of the following gives a positive test for Benedict's solution? a. sucrose b. glucose c. stanch d. lipid When drops of water and oil are placed on a sheet of brown paper, what happens to the oil after 30 minutes? a. Nothing b. The oil evaporates. c The oil spreads out, but still appears wet. d. The water and oil both evaporate 9 Which of the following provides a positive test for Biuret? a) sucrose b) egg albumin c) starch solution d) oil Chemistry for Biology Matching a negative b. positive c neutral (no charge) 10. Protons have a ______ charge. 11. Neutrons have a ______ charge. 12. Electrons have a ________ charge. 13. From the atomic number, the _________ of an element can be determined. a) number of protons b) number of neutrons c) both a & b d) number of electrons e) a & d 14. A solution with a pH of 7 is: a) basic b) neutral c) acidic d) unknown 15 A 00001M [10^-5] solution has a pH of a) 10 b) 9 c)7 d) 5 e) 4 16 The [OH^-] of the solution in #15 is a) 10 b) 9 c)7 d)5 e) 4

Explanation / Answer

(7)

Glucose gives a +ve benedict test because it is a reducing sugar

(8)

Nothing happens because oil and water don not mix.

(9)

Egg albumin gives a positive biuret test because of presence of peptide bonds.

(10)

Protons have a positive charge

(11)

Neutrons have neutral charge

(12)

Electrons have a negative charge

(13)

From the atomic number, number of protons and electrons of the element can be determined.

(14)

pH 7 solution is neutral.

(15)

pH = -log([H+]) = -log(10-5) = 5

(16)

Since pH = 5, so pOH = 14-pH = 9

So, [OH-] = 10-pOH = 10-9

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.