DNA and mRNA synthesis proceeds in the 5' to 3' direction. What do 5' and 3' refer to? a) The position of the phosphate and nitrogen bases

b) The number of carbons in the nitrogen base

c) The number of hydroxyl groups attached

d) The position of a carbon atom in the sugar backbone

Which image shows labeled organelles that are present only in plant cells?

In response to framton's dialogue about his health issues, mr. sappleton replies: "no? " said mr. sappleton, in a voice which only replaced a yawn at the last moment. then she suddenly brightened into alert not to what framton was saying. what does this statement reveal about how mrs. sappleton feels about framton? a) she finds him boring. b) she's happy he came by. c) she finds him annoying. d) she feels sorry for him

To take a whiff of your favorite food, you use both? a. motor nerves and your digestive system b. sensory nerves and your immune system c. motor nerves and your skeletal system d. sensory nerves and your respiratory system