The base pairs in a dna strand are held together with hydrogen bonds. in what way would a cell be most affected if these were covalent bonds instead? the cell would need to make new dna each time the strand was opened. the cell would only be able to open and close the dna strand when it replicated. the cell would have to take in and use more energy in order to break the covalent bonds. the cell would need to replace the nitrogenous bases each time the dna strand opened.

How do living things obtain phosphorus

The climate on the leeward side of a mountain differs from that on the windward side mostly in

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides