What must occur for a message to be sent from the outside of the cell to
inside the cell?
a. a signaling molecule binds with a membrane protein.
b. transport proteins form a channel for a large molecule.
c. enzymes inside the cell catalyze a reaction.
d. a small, nonpolar molecule crosses the membrane.

Getting out of bed is the first goal i tackle each day. 2several small goals are achieved by me as the day progresses. 3when i am riding the bus home or walking the dog, i think about the bigger goals i have for my life. which statement correctly describes the verb tense, aspect, and voice in this paragraph? a.sentences 1 and 2 contain present progressive verbs. sentence 3 contains both present progressive and simple present verbs. sentence 2 uses passive voice. b.sentences 1 and 2 contain simple present verbs. sentence 3 contains present progressive verbs. all three sentences use active voice. c.sentences 1 and 2 contain present progressive verbs. sentence 3 contains simple present verbs. all three sentences use active voice. d.sentences 1 and 2 contain simple present verbs. sentence 3 contains both present progressive and simple present verbs. sentence 2 uses passive voice.

How does a lytic infection differ from a lysogenic infection?

If the nucleus of a cell was removed the cell wouldn’t be able to make proteins because