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
Psychologist finds link between PTSD and prison
Americans who spend time in prison are nearly twice as...
medicalxpress.com
Antibiotic approved for treating infant abdominal infections
The antibiotic meropenem was approved by the U. S. Food...
medicalxpress.com
Excess weight linked to worse prostate cancer prognosis
(HealthDay)—Radiation therapy for prostate cancer may be less effective for...
medicalxpress.com
Charcot foot operations help diabetes patients walk normally again
A growing number of diabetics are being diagnosed with a...
medicalxpress.com
Morning Break: Tattoo Trauma, Beer at Bedside, Ugly Food
(MedPage Today) -- Health news and commentary from around the...
medpagetoday.com
Adolescent medicine expert helps parents share the dangers of e-cigarettes with teens
Though many think e-cigarettes are helping to reduce the number...
medicalxpress.com
RTOG 0537 shows acupuncture-like ENS may provide relief for radiation-induced dry mouth
Phase III results of Radiation Therapy Oncology Group (RTOG) 0537...
medicalxpress.com
Even moderate BMI reduction could ease A-fib burden
(HealthDay)—Incremental increases in body mass index (BMI) are associated with...
medicalxpress.com
Combined drug treatment combats kidney disease
A recent discovery by drug researchers whereby coupling specific cell...
medicalxpress.com
Footpaths and parks support active school commute
While it probably won't make the idea of attending school...
medicalxpress.com
Active substance targeting dreaded hospital germs
In the German Center for Infection Research (DZIF), scientists have...
medicalxpress.com
A new perspective on Phantom Eye Syndrome
Researchers from the University of Liverpool have found that approximately...
medicalxpress.com
ASCO: Annual Meeting Emphasizes Advances, Challenges in Cancer
(MedPage Today) -- Largest program to date highlights developments in...
medpagetoday.com
Restricting firearms access for people who misuse alcohol may prevent violence
Restricting access to firearms for people who misuse alcohol could...
medicalxpress.com
Leading-edge diabetes treatment program hits milestone
An Edmonton health care team has cemented its status as...
medicalxpress.com
'Hippy crack' among legal highs UK government wants to ban
Legal highs such as "hippy crack" would be made illegal...
medicalxpress.com
Research proposes new way to reverse resistance to chemotherapy
A serious medical problem that oncologists face is multi-drug resistant...
medicalxpress.com
Life-prolonging protein could inhibit ageing diseases
Researchers have found a molecule that plays a key link...
medicalxpress.com
Changing activity in the ageing brain
Normal ageing affects our ability to carry out complex cognitive...
medicalxpress.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 +