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[email protected] - 1 to 4(1 point each For each of the...

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1 to 4. (1 point each) For each of the following substances, (all of which may be found in the blood stream of humans) indicate the whether or not a membrane channel or transporter would be required to move the substance across the membrane. A (True) = transporter required B (False) = no transporter required 1. oxygen B 2. chloride ion (Cl - ) A 3. fatty acid B 4. phospholipid A – see Figure 5.3 in your text 5. Lactose, the sugar found in milk, is a disaccharide formed by joining glucose and galactose in a dehydration reaction. The chemical formula of both glucose and galactose is C 6 H 12 O 6 . What is the chemical formula of lactose? (2 pts.) A. C 6 H 12 O 6 B. C 12 H 24 O 12 C. C 12 H 20 O 10 D. C 12 H 22 O 11 E. none of the above 6. Some biologists think that RNA molecules were able to self-replicate, due in part to (2 pts.) A. the hydrogen bonding between complementary nucleotides B. the hydrogen bonding between nucleotides and specific amino acids C. the ability of RNA to form biological membranes D. the ability of DNA to direct the synthesis of RNA
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