1. DNA replication is A. Conservative B. Semiconservative C. Dispersive D. A combination of the above 2. The Meselson-Stahl experiment was conducted to understand: A. The cell cycle phases B. mRNA translation C. DNA structure D. DNA replication 3. Which statement is true about DNA helicase? A. It hydrolyzes ATP B. It breaks the covalent bonds in the DNA C. It can move on the DNA in any direction (5'-to-3' or 3'-to-5') D. It is needed on both DNA strands

1. Biolistics: plant tissues; heat shock treatment: _______  a. mammalian cells b. viruses c.bacteria d.animal cells   2. This genetic engineering process involves the incubation of the purified DNA with the selected RE, at optimal conditions for that specific enzyme. a. Ligation b. Cutting c. Transformation d. Isolation

DNA strands are anti-parallel and DNA polymerase can only synthesize DNA in a 5' to 3' direction. How does the enzyme synthesize both strands at the same time?    A. The leading strand is sythesised in Okazaki fragments  B. The lagging strand is synthesised in short Okazaki fragments.  C. Only one strand is replicated.  D. There are more than one DNA polymerase involved.

High concentrations of nuclear CyclinD is required for entry into S phase. Which of these events MOST likely occur upon entry into S phase? A. CyclinD is synthesized. B. CyclinD is degraded. C. DNA is polymerized. D. DNA is depolymerized. I believe that the answer is (B) because after entry into the S phase, cyclinD levels fall drastically.  Can you please explain why this is not the right answer.  Thanks

In DNA replication, what is meant when we say it is “semi-conservative”?    a. One new DNA molecule contains the parent strands and the other DNA molecule contains only new strands b. Both new DNA strands contain a parent strand and a template strand c. The new DNA molecules are exactly like the original strand d. Some of the genes are replicated, some aren’t

Wish of the following statements is true about DNA? a. DNA is the hereditary material in almost all organisms b. The replication of mitochondrial DNA is controlled by nuclear DNA c. Most DNA is found in the mitochondria d. Human nuclear DNA consists of one polynucleotide that carries all e. Mitochondrial DNA controls most of the cell activities Question After using the blender to blend the split peas, water, and salt mixture, cheesecloth is used to ......... a. Filtrate the mixture and precipitate the protein b. Filtrates the contents of the blender to collect the strained fluid for DNA extraction c. Separate the DNA from the protein that folded and protected the DNA d. Collect pure nucleic acid e. Precipitate the nucleic acid acidgenetic information

a) Estimate the lengths of each of the DNA fragments shown in this gel   A:____________   B: ____________  C: ____________  D: ____________  E: ____________  F: ____________   b) Which letter represents the DNA fragment that is the smallest?   c) Which DNA fragment is approximately the same length as the lengths of fragments D & C added together?   Part 4. Putting It Together 1) Consider the diagram below as well as the given information. This diagram represents a piece of circular DNA which was cut in 4 separate reactions (4 different test tubes, each with some of this DNA in it). One digest was done with AvaI, another with ClaI, a third with EcoRV, and a fourth with ScaI. The locations of the recognition sequences for each restriction enzyme are shown along with the location of that site in bp along the circle (it goes clockwise from position 1). You run an agarose gel with a molecular weight marker in the first lane, the AvaI digest in lane 2, the ClaI digest in lane 3, the…

Which of the following is not a necessary component for DNA synthesis?   a. DNA polymerase I   b. dNTPs   c. Copper ions   d. Parental strand of DNA   e. All of the above are required for DNA synthesis

What is the major role of DNA polymerase in the DNA replication?   a. Attached RNA primers to initiate the addition of complementary nucleotide sequence at the 5’ to 3’direction b. Adds up new complementary nucleotide sequence at the 3’ to 5’ direction of the DNA template. c. Unwinds the double helix by breaking the bonds at the 3’ to 5’ polymerization activity. d.It transiently cuts each strand to prevent supercoil at the 5’ to 3’ polymerization activity complementary to the RNA strand

During DNA replication: A. The two DNA strands separate, each strand then becomes a template for the assembly of a complementary strand. Each new DNA helix has one old strand with one new strand. B. The two DNA strands separate, each strand then becomes a template for the assembly of a similar strand. Each new DNA helix has one old strand with one new strand. C. The two DNA strands separate, each strand then becomes a template for the assembly of a similar strand. Each new DNA helix has two new strands. D. The two DNA strands separate, each strand then becomes a template for the assembly of an identical strand. Each new DNA helix has one old strand with one new strand.