We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

DNA Worksheet Essay Sample

The whole doc is available only for registered users OPEN DOC
  • Pages:
  • Word count: 485
  • Category: cell gene

A limited time offer!

Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed

Order Now

DNA Worksheet Essay Sample

1. Describe the structure of DNA. It is a right handed double helix. It is made up of nucleotides that are bound to each other by covalent bonds. Nucleotides are abbreviated as A, G, C, and T. The abbreviated nucleotides stand for Adenine, Guanine, Cytosine, and Thymine (Simon, Reece, & Dickey, 2010).This bond consists of the sugar from one nucleotide and the phosphate of the next nucleotide. This bond is referred to as a “sugar-phosphate backbone”. The nitrogenous bases are arranged in an order where they appear to project off of the backbone, moving from left to right. *

* Adenine and Guanine are Purines, and Cytosine paired with Thymine is called Pyrimidines (Simon, Reece, & Dickey, 2010).

2. How does an organism’s genotype determine its phenotype? The genotype basically is the sequence of nucleotides bases in its DNA (Simon, Reece, & Dickey, 2010). The genes are transcribed to produce mRNA. The mRNA is translated to produce proteins. The proteins are most often enzymes that speed up reactions that would otherwise take forever to happen. These reactions involve the formation of products that are functioning in the cell for various things such as structural support, enzymes that provide metabolic food molecules like glucose, energy production, transport, signal systems, pigmentation, attachment to other cells and various others. * For example, there is a gene that produces protein involved in the production of melanin (skin pigment). When this gene is mutated or non-functional, the enzyme is not produced (Simon, Reece, & Dickey, 2010).

3. Describe each stage of the flow of information starting with DNA and ending with a trait. In eukaryotic cells, transcription, the stage from DNA to RNA, occurs in the nucleus, and then RNA is processed before it enters the cytoplasm. Translation is happens very quickly; a single ribosome can make an average-sized polypeptide in less than a minute. As RNA is made, a polypeptide coils up, assuming a three-dimensional shape. Several polypeptides can come together, forming a protein with quaternary structure (see Figure 3.20, p. 185) (Simon, Reece, & Dickey, 2010). According to page 185 of the text book, “The chain of command originates with the information in a gene, a specific linear sequence of nucleotides in DNA.” The gene dictates the transcription of a corresponding sequence of nucleotides in mRNA. In turn, mRNA specifies the direct sequence of amino acids in a polypeptide. Finally, the proteins that form from the polypeptides determine the appearance and capabilities of the cell and ultimately, the organism. For many years, the DNA to RNA to protein pathway was believed to be the only means by which genetic information controls traits. In recent years, however, this belief has been challenged by findings that point to more complex roles for RNA.

Works Cited
Simon, E. J., Reece, J. B., & Dickey, J. L. (2010). Campbell Essential Biology with Physiology, Third Edition. Pearson Education, Inc.

We can write a custom essay

According to Your Specific Requirements

Order an essay
Get Access To The Full Essay
Materials Daily
100,000+ Subjects
2000+ Topics
Free Plagiarism
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
Sorry, but only registered users have full access

How about getting this access

Become a member

Your Answer Is Very Helpful For Us
Thank You A Lot!


Emma Taylor


Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?

Get access to our huge, continuously updated knowledge base

The next update will be in:
14 : 59 : 59
Become a Member