A biochemist is studying the mechanism of DNA replication by stopping the reaction shortly after its initiation. Analysis of the products from the reaction in a gel reveals the presence of single-stranded and double-stranded DNA. The shorter fragments of DNA were found to be attached to a complementary sequence of 10 ribonucleotides. which of the following is the most likely explanation for the data?
A - Short fragments of mRNA bind at random to available single-stranded DNA sequences in the cell
B - tRNAs bind to available single-stranded DNA sequences in the cell
C - Short ribonucleotide sequences are the primers for DNA polymerases
D - Short sequences of RNA attached to DNA represent an artifact of the isolation procedure

I'm thinking it is C, not so sure tho

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.

Astudent from one of the research labs is having trouble preparing a slide for examination and photographing. the bacterial slide that he has brought to you was prepared using a commercially purchased stain. he has asked for your in determining what he is doing wrong so that he can change the lab protocols and continue on with his project. after examining the slide under oil immersion, you determine that no bacteria are present even though the student is able to show you the culture he used to make that slide that has visible growth in the liquid medium. which of the following statements does not explain the fact that there are no bacteria present on the student’s slide? by not allowing a glass slide to completely air dry before heat fixation, the flame will cause the surrounding water to boil and this will damage the bacterial cell. overheating during the fixation step boiled the water within the bacterial cells and resulted in the cells bursting. insufficient heating of the slide did not drive out the thin layer of water and this resulted in minimal bonding between the bacteria and the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide.

Which state of matter has the following physical properties: ~ takes the shape of the container it is in ~ takes the volume of the container it is in ~ low density. answer is gas