DNA is composed of nucleotides, which are composed of three parts:
1. A five carbon carbohydrate (pentose)
Pentose is classified as a monosaccharide (simple carbohydrate), and its molecular formula is represented by 
. They are water soluble molecules with sweet taste. Monosaccharides may have from three carbon atoms (trioses) to six (hexoses). In DNA is present pentose (5 carbon atoms)
2. A nitrogenous base
Nitrogenous bases are ring-shaped compounds that contain nitrogen in their molecular structure. They are classified into two groups: purines and pyrimidines
The purine bases are adenine (A) and guanine (G). They are larger and contain more than one ring in their structure,.
The pyrimidines, cytosine (C), uracil (U) and thymine (T), are smaller and composed of a single ring.
3. One or more phosphate groups
A phosphate consists of a trivalent anion that contains one phosphorus atom and four oxygen atoms. Its molecular formula is expressed by 
.
Answer:
The promoter region/sequence
Explanation:
Promoter sequences/region is where the transcription factors and RNA polymerase must attach before the gene can be transcribed. SO if we mutate this sequence, the transcription factors and RNA polymerase won't recognize it thus would not attach and transcribe the targeted gene.
They are accepted as true until they are proven false. Once a theory has been tested and it is wrong, then it is no longer true.
The statement that is true about Enzymes is that A) They are used up in the reactions they catalyse.
<span>A woman who has completed one pregnancy with a fetus (or fetuses) reaching the stage of fetal viability is called Primipara</span>
pri·mip·a·ra<span>prīˈmipərə/</span>nounMedicine<span>noun: primipara</span><span>; plural noun: primiparae</span><span>a woman who is giving birth for the first time.
What are your answer choices? This is what I think the answer might be from the information given.
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