Look at the cell diagram. Which letter indicates a cell structure that directly controls the movement of molecules into and out of the cell?
Structure A

Structure B

Structure C

Structure D

Which best describes a benefit of using dna technology in medicine? a) medicine can be produced in mass quantities. b) medicine can be distributed at a reduced cost. c) medicines have fewer side effects. d) medicines are resistant to antibiotics.

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other

Why do mountaineers become breathless as they reach high altitudes