DNA Replication (True and False)(some random things)

Meselson-Stahl

________ - _____ experiment proved that DNA was semi-conservative

Amino acid

3 bases make up 1 _____ ____

Initiation

What stage of DNA replication is this?
Section of DNA is unwound to expose the bases for new base pairs

Elongation

What stage of DNA replication is this?

2 new DNA strands are created using the 2 parental strands as templates

Termination

What stage of DNA replication is this?

Process completes and new DNA molecules reform into helices

false

In Initiation:

True or false

Specific enzymes recognize certain base pair areas from 50-250 base pairs long.

True

In Initiation:

True or false

1. Initiation starts at areas called Origins

True

In Initiation:

True or false

2. DNA gyrase is an enzyme that will unwind the DNA

False

In Initiation:

True or false

2. DNA Helicase is a hormone that will “unzip” the strands and separates the DNA

True

In Initiation:

True of false

3. DNA Helicase breaks the H-bonds between base pairs to form the replication bubbles.

false

In Initiation:

True or false

4. DNA polymerase 3 will attach to the ‘free’ sections of the DNA to prevent it from bonding and rewinding into its helix shape

False

In Elongation:

True or false

DNA polymerase 1 adds new bases onto the parental strands

True

In Elongation:

True or false

DNA polymerase 3 adds new bases in the direction from the 3’ end of the parental strand towards the 5’ end of the parental strand

True

In Elongation:

True or false

New bases that are added must start from a RNA primer

True

In Elongation:

True or false

New bases can only be paired up in the 5’ to 3’ direction of these new strands

False

True or False

Primase attaches and adds bases to the parental strand

True

True or False

DNA polymerase 3 is the enzyme that will add complementary nucleotides in the 5’ to 3’ direction

False

True or False

In the leading strand, it have jumps and gaps

True

True or False

DNA polymerase 1 attaches to the RNA primer and dismantles it

True

True or False

Primase attaches and adds RNA nucleotides to the parental strand

True

True or False

The RNA nucleotides that the Primase adds are also called RNA primers

False

True or False

DNA polymerase 2 will start adding complementary nucleotides in the 5’ to 3’ direction away from the fork in a lagging strand

True

True or False

DNA polymerase 3 will continue until it meets a RNA primer where it will detach. (in lagging strands)

False

True or False

Small pieces of DNA created by the lagging strand are called Ozazaki fragments

True

True or False

DNA Ligase will join Okazaki fragments together by forming Phosphodiester bonds between nucleotides

Phosphodiester

What bonds do DNA Ligase form?

False

In Termination:

True or False

1. DNA will go back to its original shape through the help of enzymes

True

In Termination:

True or False

3. Small parts of unpaired DNA be snipped off resulting in the new strand being slightly shorter than the original

telomeres

What is found at the end of each chromosome?

TTAGGG

What is the base pairing of telomeres?

True

True or False

When telomeres erode, cells die

False

True or False

Telomerase is a hormone that replenishes telomeres

DNA polymerase 2

What enzymes is used for proofreading the new DNA?

True

True or False

DNA polymerase 3 works at 1000 nucleotides/s