1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
LekaFEV [45]
3 years ago
8

The nitrogen base pictured is adenine. Is this nucleotide considered a purine or a pyrimidine? There is a molecule, a base of wh

ich is formed by 2 fused rings, each of which contains 2 nitrogen atoms in their structure. One ring is five-membered while the other is a six-membered ring. The nitrogen base pictured is adenine. Is this nucleotide considered a purine or a pyrimidine? a. purine b. pyrimidine
Biology
1 answer:
Vlad [161]3 years ago
5 0

Answer: Purine

Explanation:

A purine is a nitrogenous base found in nucleic acids, and contains a 6-membered pyrimidine ring fused to the 5-membered imidazole ring. The most common examples of purine bases are adenine and guanine.

Thus, the nitrogen base pictured is adenine, and the nucleotide considered is a purine

You might be interested in
A neonate is experiencing respiratory distress and is using a neonatal oxygen mask. an unlicensed assistive personnel has positi
Free_Kalibri [48]
<span>The nurse should assess the four-hour-old neonate with jaundice. When jaundice occurs within the first 24 hours of life, it typically indicates a life-threatening disorder, such as sepsis, hemolytic disease of the neonate, Rh incompatibility, or ABO incompatibility. Physiological jaundice, which commonly occurs later, is a benign condition. A 2-day-old term neonate in an open bassinette doesn't require immediate assessment by the nurse. A 6-day-old neonate whose gestational age is 36 weeks is a normal preterm neonate who doesn't require immediate assessment by the nurse.s appropriate for the neonate. Explanation: The correct size covers the nose but not the eyes. The mask is too large if it covers the neonate’s eyes. Masks that are too small may pinch the nose.</span>
7 0
2 years ago
Write a summary about the cell theory
julia-pushkina [17]

Answer:

Over the next two centuries after the discoveries of Hooke and Leeuwenhoek, biologists found cells everywhere. Biologists in the early part of the 19th century suggested that all living things were made of cells, but the role of cells as the primary building block of life was not discovered until 1839 when two German scientists, Theodor Schwann, a zoologist, and Matthias Jakob Schleiden, a botanist, suggested that cells were the basic unit of structure and function of all living things. Later, in 1858, the German doctor Rudolf Virchow observed that cells divide to produce more cells. He proposed that all cells arise only from other cells. The collective observations of all three scientists form the Cell Theory, which states that:

all organisms are made up of one or more cells,

all the life functions of an organism occur within cells,

all cells come from preexisting cells.

Though no one point of the Cell Theory is more important than another, the theory clearly states that the functions necessary for life occur in the cell. Findings since the time of the original Cell Theory have enabled scientists to "modernize" the theory, including points related to biochemistry and molecular biology. The modern version of the Cell Theory includes:

all known living things are made up of one or more cells,

all living cells arise from pre-existing cells by division,

the cell is the fundamental unit of structure and function in all living organisms,

the activity of an organism depends on the total activity of independent cells,

energy flow (metabolism and biochemistry) occurs within cells,

cells contain hereditary information (DNA) which is passed from cell to cell during cell division,

all cells are basically the same in chemical composition in organisms of similar species.

The Cell Theory is one of the main principles of biology. The points of the theory have been found to be true for all life. As with any scientific theory, the Cell Theory is based on observations that over many years upheld the basic conclusions of Schwann’s 1839 paper. However, one of Schwann’s original conclusions stated that cells formed in a similar way to crystals. This observation, which refers to spontaneous generation of life, was discounted when Virchow proposed that all cells arise only from other cells. The Cell Theory has withstood intense examination of cells by modern powerful microscopes and other instruments. Scientists continue to use new techniques and equipment to look into cells to discover additional explanations for how they work.

Explanation:

Hope I helped!

4 0
2 years ago
Read 2 more answers
Suppose you found a fossil of a clam shell what can you conclude about the once-living organism and how it became a fossil?
Stolb23 [73]

Answer:

Identifying the fossil is the first step. We have already identified this fossil as a clamshell. We know clam are from the sea, but if you didn't, you could conclude this from knowing where you found the fossil (likely near the beach). Discovering where it is can also lead you to a conclusion on it's arrival as a fossil, perhaps washed up on shore or buried by an animal.

Explanation:

8 0
3 years ago
Read 2 more answers
What does photosynthesis produce (make) ?
Elan Coil [88]

Answer:

photosynthesis produce food for plants

8 0
2 years ago
How is a model of the carbon cycle different from the actual cycling of carbon in an ecosystem?
Lerok [7]

Answer:

The biological carbon cycle is not only faster than the geological carbon cycle. The amount of carbon taken up by photosynthesis and released back to the atmosphere by respiration each year is 1,000 times greater than the amount of carbon that moves through the geological cycle on an annual basis.

Explanation:

4 0
2 years ago
Read 2 more answers
Other questions:
  • TRUE or FALSE: The seasons are caused by the tilt of the Earth’s axis. A. FALSE B. TRUE
    12·2 answers
  • Which kind of plants are generally the last to appear in the area going through primary succession
    7·1 answer
  • Which of the following statements is true?
    5·2 answers
  • What processes are necessary in order to turn sand into rock?
    10·1 answer
  • 1 Invasive plant species affect the interactions of living and nonliving components
    14·2 answers
  • HELP PLZZZZ all u need to know is in picture
    8·2 answers
  • If a new moon is on June 1st then a full moon will occur on *
    10·2 answers
  • The first living thing to grow successfully on a newly formed sand dune are known as?
    6·1 answer
  • Read the article and use the information to answer the following question. Somatotypes What are three types of body shapes that
    15·1 answer
  • Which is an example of using a mathematical model to describe the atom?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!