DNA replication occurs in the 5 prime (5') to 3 prime (3') direction.
I'm sure you've heard this many times. I tutor in genetics, and all of my students can rattle that off. Less understand what it means.
First, understanding what 5' and 3' mean is important. DNA is composed of a ribose sugar, a phosphate group, and a base (A,T,G,C). The sugar has a phosphate group attached to its fifth carbon, and a hydroxyl group on its 3rd carbon. Nucleotides (separate components of DNA) are linked by the phosphate group and the hydroxyl group. So, every nucleotide is linked at the phosphate group and the hydroxyl group besides two - the two nucleotides at either end of the strand of DNA. The one that leaves a phosphate group exposed is called the 5' end of DNA, and the one that leaves a hydroxyl group exposed is called the 3' end of DNA.
<span>A problem with many students just memorizing that replication occurs in the 5' to 3' direction is that there are two strands of DNA involved in replication. DNA polymerase (the major enzyme responsible for replication) reads the already existing strand of DNA in the 3' to 5' direction, and creates the new strand of DNA in the 5' to 3' direction (meaning that it adds nucleotides to the 3' end of the new strand).</span>
The correct answer is - quartz.
The quartz is a light colored, transparent mineral, with hardness of seven, and is characteristic that instead of cleaves it has fractures. This mineral is composed of silicon and oxygen atoms, which make a tetrahedral structure. It is the second most abundant mineral in the Earth's crust, just after the feldspar.
Answer:
Explanation:
They catalyze the synthesis of short RNA molecules used as primers for DNA polymerases.
Answer:
1.Aquatic
2.Endangered Species
3.Aquifer
4.Exotic
5.Ground Water
6.Habitat
7.Estuary
8.Toxin
9.Rehabilitation
10.River
Please note i may be wrong.
<span> c. a rapid increase in the number of related species</span>. Adaptive radiation refers to an event in which a particular linage of organism rapidly diversifies into newly formed lineages that have evolved with different adaptations.
