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zheka24 [161]
2 years ago
13

When does DNA replication occur in the cell and what is the result

Biology
1 answer:
kari74 [83]2 years ago
6 0
After mitosis and cytokinesis are completed, the interphase allows the cell to recover, rebuild its proteins and, in the S phase, replicate its DNA. (I tried)
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An element's atomic number is 42. How many electrons would an atom of this element have?
Alika [10]

Molybdenum is the element on the periodic table that has 42 as it's atomic number. It has 42 electrons. Hope this helps! =^-^=

7 0
3 years ago
A nurse receives a verbal order which was understood to be for avert 6. the physician actually ordered antivert 25 mg daily. the
ValentinkaMS [17]
This situation describes JUST CULTURE.
JUST CULTURE is a concept that is used in health care to improve patients' safety. The concept involves examination  and analysis of medical errors made by medical practitioners in the course of their duties in order to prevent such occurrence in the future.<span />
4 0
3 years ago
Put these steps in the order in which they occur in light-dependent reactions. Electrons are transferred from photosystem II to
Tamiku [17]

Explanation:

  1. Light energy is absorbed and transferred to the reaction center.
  2. A water molecule is split.
  3. Electrons are transferred from photosystem II to photosystem I.
  4. ATP is synthesized from ADP and inorganic phosphate.

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

The chloroplast is a membrane bound organelle found in plants. It contains several invaginations of  a plasma membrane called the thylakoid membrane. This contains chlorophyll pigments, in stacks called granum, while the internal spaces of the organelle are called the lumen. Liquid surrounds the granum, forming the stroma.

During the light reaction:

  • Light is absorbed by pigments in phosystem II (PSII). This energy is transferred among pigments til it gets to the reaction center, and is transferred to P680; this promotes an electron to a higher energy level where it then goes to an acceptor molecule.
  • Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II. Additionally, water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent.
  • the electron moves down an electron transport chain (ti PS I)where it experiences continuous energy loss. This energy fuels the pumping of H+ from the stroma to thykaloid, leading to the formation of a gradient. The H+ move along their gradient and cross through ATP synthase, into the the stroma.
  • ATP synthase converts ADP and Pi to the energy storage molecule  ATP.
  • The electron gets to photosystem I where it  goes to pigments at P700. It absorbs light energy, the electron is promoted to a higher energy level, and passed to an electron acceptor. This leaves a space for another electron which is then replaced by one from photosystem II.
  • in the ETC,  the molecule NADP is reduced to NADPH by providing H+ ions. NADP and NADPH are integral to the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

5 0
3 years ago
If this population continued for the next 100 years with no changes in arm length, what could you say about these sea stars?
Aleks [24]
They have evolved into the best length for their environment. 
4 0
2 years ago
Which has characteristics similar to a scientific model? A. the Brooklyn Bridge B. a planetary rover C. a deep-sea submersible D
Lerok [7]
C. a toy train is the item that has characteristics similar to a scientific model.
4 0
3 years ago
Read 2 more answers
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