The first step of PCR During the first step of a PCR reaction,
A. DNA is heated to allow DNA polymerase to add nucleotides to the growing DNA strands.
B. DNA is heated to break the hydrogen bonds that hold the two strands together
C. DNA is cooled to allow DNA polymerase to add nucleotides to the growing
D. DNA strands DNA is cooled to allow the primers to bind to the DNA strands.
The second step of PCR During the second step of a PCR reaction,
A. DNA is heated to allow DNA polymerase to add nucleotides to the growing DNA strands
B. DNA is heated to break the hydrogen bonds that hold the two strands together
C. DNA is cooled to allow DNA polymerase to add nucleotides to the growing DNA strands.
D. DNA is cooled to allow the primers to bind to the DNA strands Primers

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip.nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule.true/false

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?