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 requiredB (False) = no transporter required1.oxygen B2.chloride ion (Cl-) A3.fatty acid B4.phospholipidA – see Figure 5.3 in your text5. 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 C6H12O6. What is the chemical formula of lactose? (2 pts.)A. C6H12O6B. C12H24O12C. C12H20O10D. C12H22O11E. none of the above6. Some biologists think that RNA molecules were able to self-replicate, due in part to (2 pts.)A. the hydrogen bonding between complementary nucleotidesB. the hydrogen bonding between nucleotides and specific amino acidsC. the ability of RNA to form biological membranesD. the ability of DNA to direct the synthesis of RNA
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