It is common to use ddntps (dideoxynucleoside triphosphates) for sequencing dna because, when incorporated into a growing dna polymer, the ddntp acts as a chain terminator, allowing the researcher an opportunity to determine the last-added base to a given chain. from your knowledge of nucleotide structure and dna synthesis, what is the most likely attribute of ddntps for dna sequencing?

a. the ddntps lack a 5′ carbon.

b. the ddntps lack a 3′ hydroxyl group.

c. the ddntps lack a nitrogenous base.

d. the ddntps lack the sugar component.

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

Idon’t understand this can someone give me the answer? you

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.