2. Why are enzymes necessary in order for chemical reactions to occur in living systems and organisms?

Which of these is an environment effect of farming? A. Temperature increase B. Soil erosion C. Habitat succession D. Natural disasters

The LDL receptor is a receptor for: a. apolipoprotein B. b. receptor-mediated endocytosis of LDL. c. cell signaling via activation of adenylate cyclase. d. apolipoprotein B and receptor-mediated endocytosis of LDL.

How could two genetically identical oak trees have different heights when tree height is a heritable trait?

How does a heavy metal plane fly?

Which of the following is true about synthesis of mRNA? A. It occurs outside the nucleus B. No enzymes are involved C. It follows assembly of amino acids into proteins D. It takes place along an unraveled section of DNA

When a cell is not dividing it is said to be resting?

Where in the cell are ribosomes made?

Both external and organization factors shape internal pay structures. a. True b. False

Which of the following describes the solar radiation absorbed by and radiated from earth?

Mutations in DNA are usually caused by chemical or radiation damage to DNA molecules, followed by imperfect repair of the damage. Immediately after this kind of imperfect repair, there may be a mismatched base pair in the DNA.