Quantcast Figure 4-11. The 5 nitrogen bases found in DNA. - Fundamentals of X-Ray Physics

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
a. Somatic Cells. Somatic cells are those of a specific individual tissue such as
heart, lung, or liver. Their functions provide life for an individual. Somatic cells give
their daughter cells operating instructions to act like they themselves acted.
b. Gonadal Cells. Gonadal cells ensure a species' continuance. When
creating a new member of the species, the operating or genetic instructions of two cells
interweave, add, subtract, and modify. If either cell has been previously modified, it
cannot pass on the genetic instructions it should.
4-22. DEOXYRIBONUCLEIC ACID AND RIBONUCLEIC ACID
All cells have one common and extremely vital characteristic: they pass on to
their daughter cells operating instructions which are extremely detailed, highly complex,
and an exact duplicate of the instructions they received from their parent cells.
Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are substances found in all
cells and serve as blueprints for cell reproduction.
a. Deoxyribonuclei Acid Molecule. The DNA molecule is a double helix that has
two important functions--replication and control of cellular activities. The fundamental unit
of DNA is the nucleotide, which consists of a phosphate group, a 5-carbon sugar, and a nitrogen
base. There are four nitrogen bases found in DNA--guanine, cytosine, adenine, and
thymine. They are shown in figure 4-11 with different shapes for illustrative purposes.
One end of each nitrogen base is identical to the others. It fits the 5-carbon sugar
perfectly, but it will not fit the phosphate group. The nitrogen bases fit each other only in
specific combinations: guanine with cytosine and adenine with thymine.
Figure 4-11. The 5 nitrogen bases found in DNA.
MD0950
4-18



Medical News
Abandoned asbestos mines still a hazard in India
Asbestos waste spills in a gray gash down the flank...
medicalxpress.com
Radiologist recommendations for chest CT have high clinical yield
A substantial percentage of patients who receive radiologist recommendations for...
medicalxpress.com
IMF lending undermined healthcare provision in Ebola-stricken West Africa
Writing today in the journal Lancet Global Health, researchers from...
medicalxpress.com
Seeing the doctor, overseas: Medical tourism booms in Asia
The lines snaking into Bangladesh's overwhelmed hospitals are often so...
medicalxpress.com
Bone loss drugs may help prevent endometrial cancer
A new analysis suggests that women who use bisphosphonates—medications commonly...
medicalxpress.com
Consumer purchases of cakes, cookies, pies have decreased by 24 percent
Ready-to-eat grain-based desserts (RTE GBDs) are pre-packaged consumer baked goods...
medicalxpress.com
Tips offered to docs, spouses for maintaining happy marriage
(HealthDay)—Simple tips can help physicians and their spouses maintain marital...
medicalxpress.com
Risks ID'd for referral-warranted retinopathy of prematurity
(HealthDay)—Predictors have been identified for referral-warranted (RW)-retinopathy of prematurity (ROP),...
medicalxpress.com
SLNB doesn't up survival in melanoma arising in head, neck
(HealthDay)—For patients with melanoma arising in head and neck subsites...
medicalxpress.com
The Week Ahead: Diabetes Drugs, Musical Medicos
(MedPage Today) -- What do we really know about drug...
medpagetoday.com
Evidence plays limited role in OTC decision making
(HealthDay)—For pharmacy graduates and tutors, evidence seems to play a...
medicalxpress.com
Shared medical appointments beneficial in geriatric care
(HealthDay)—For older patients, a shared medical appointment (SMA) program facilitates...
medicalxpress.com
Synovitis Is Precursor of Radiographic Knee OA
(MedPage Today) -- Study finds inflammation plays early role in...
medpagetoday.com
Side Effects Strike Third of Arthritic Kids on Biologics
(MedPage Today) -- Anti-TNF agents a concern in juvenile idiopathic...
medpagetoday.com
Restrictions lifted at British bird flu farm
Britain on Sunday lifted all restrictions at a duck farm...
medicalxpress.com
Sierra Leone urges safe burials to stem Ebola
The radio announcement is chilling and blunt: "If I die,...
medicalxpress.com
Training Location Key to Medicare Billing Practices (CME/CE)
(MedPage Today) -- As the resident is trained, so the...
medpagetoday.com
First successful vaccination against 'mad cow'-like wasting disease in deer
Researchers at NYU Langone Medical Center and elsewhere say that...
medicalxpress.com
The Slippery Slope: A Bittersweet Diabetes Economy
(MedPage Today) -- From 2004 to 2013, none of the...
medpagetoday.com
The Slippery Slope: A Bittersweet Diabetes Economy
(MedPage Today) -- From 2004 to 2013, none of the...
medpagetoday.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +