What is Cas9 and what does it do? * A:an RNA molecule that binds to target DNA via complementary base pairing
B:a DNA sequence that binds the Cas9 protein
c:a viral protein that disrupts bacterial membranes
D:a protein enzyme that cuts both strands of DNA at sites specified by an RNA guide

What is the number of phosphates in an atp molecule

Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet

Abeaker of water was heated and then placed on a bench in the laboratory. the water cooled until it was the same temperature as the air in the laboratory. which of these explains the mechanism by which the water cooled? a. heat energy was transferred from the water to the air. b. water molecules from the water formed warm water currents. c. the water molecules absorbed energy from the molecules in the air. d. the water released radiation until it contained no heat energy.