After DNA replication, each new DNA double helix consists of two old strands O each new DNA double helix consists of two new strands O each new DNA double helix consists of one old strand and one new strand O one new DNA double helix consists of two old strands, the other DNA consists of two new strands

Which of the following is not necessary for replication to proceed? O MRNA O RNA primer O DNA polymerase O primase O DNA ligase

As the minor and major grooves wind around a DNA double helix,do they ever intersect each other, or do they always run parallel toeach other?

What happens to the RNA primers found in newly synthesized DNA? Their nucleotides are converted to deoxynucleotides by an enzyme They remain in the DNA They are removed by an enzyme and replaced with DNA

A mistake in DNA replication, in which the wrong base is placed in the growing DNA strand, can have profound effects on the descendents of any cells that carry the mistake.In the following strand, the A has been changed to a G. Draw the DNA molecules that result from replication of the altered strands.      Original Strand     T A G C G T T        Mutated Strand T G G C G T T                                A T C G C A A                                   A T C G C A A

Match each of the following aspects of DNA with the main structural feature which makes it possible. You may use each match more than once (or not at all). Proteins can "read" the DNA without separating the two strands. DNA is resistant to hydrolysis. DNA can be repaired. DNA can self-replicate. 1. DNA does not have a 2' hydroxyl. The two strands in the double helix are complementary. 3. DNA is a polymer of nucleotides. 4. B-DNA has a "major groove". 2.

5

5. DNA is made of two strands that are antiparallel. If one strand runs from 3' to 5' direction the other one will go from 5' to 3' direction. During replication or transcription, whatever the process is, it will always follow the 5' to 3' direction using the 3' to 5' directed strand as the template strand. Therefore, if following is the DNA sequence 5'-CCG ATC GCA CAA-3' a) Using this sequence as template after transcription no protein can be translated. Why? I. Presence of start codon II. Absence of start codon III. Due to mutation b) If you want to start the translation, what change you need in the second codon (from 5' to 3' direction)? I. Substitution of C with G II. No change III. Deletion of C IV. Both I & III

What is o The DNA running both ways from one origin of replication to the endpoints, where it merges with DNA from adjoining replication forks?

During DNA replication, a template strand is used to synthesize a new "daughter" strand of DNA. Below is a sequence of a short segment of DNA. Provide the base sequence in the complementary strand and label all ends. 5’  A A T C G T A A G C T 3’