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nadya68 [22]
3 years ago
9

The cell cycle an mitosis

Biology
2 answers:
almond37 [142]3 years ago
6 0

The process of mitosis, or cell division, is also known as the M phase. This is where the cell divides its previously-copied DNA and cytoplasm to make two new, identical daughter cells. Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase.

mark brainliest thank you :)

tester [92]3 years ago
5 0

The process of mitosis, or cell division, is also known as the M phase.

Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase.

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Where does pyruvate as intermediate take place in photosynthesis? plz explain also thanks
mr Goodwill [35]

Answer:

Pyruvate take place after the process of glycolysis.

Explanation:

Pyruvate as intermediate take place in the process of photosynthesis after glycolysis process. One glucose molecule is converted into two molecules of pyruvate. This pyruvate molecule then converted into acetyl CoA, which is a two-carbon molecule. A molecule of coenzyme A is a very important reactant for this reaction, which produces a molecule of carbon dioxide and reduces a NAD+ to NADH.

7 0
3 years ago
What would happen to the concentrations of ATP, NADPH and Sugars if PSII stopped working?
dezoksy [38]

Answer:

<u>1. ATP - decrease </u>

<u>2.NADPH - decrease </u>

<u>3. sugars - decrease </u>

And    <u>True- Both ATP and NADPH are needed to make sugars.</u>

Explanation:

Photosynthesis is a form of biosynthesis that produces glucose from the reactants;  it uses energy from sunlight, along with carbon dioxide and water. It happens in the chloroplast in two phases; the light-dependent and dark reactions. In the light reaction, solar energy stimulates photosystems, formed from pigments like chlorophylls.

Chlorophyll forms photosystems of proteins known as complex proteins (PS I & PSII).  PS II absorbs and moves the reaction center with light energy.  

  • H+, and oxygen,  are formed from a water molecule as it's broken apart.
  • From photosystem II, electrons are transferred to photosystem I.  
  • ATP is synthesized from ADP along with inorganic phosphate.  
  • To form NADPHH, H+ is added to NADP

If PS II no longer works,  there will be less ATP, NADPH, (both used later on) and no sugars produced.

In the dark reaction, products of the light reaction are used to make sugars. Here, in the Calvin cycle, the enzyme, RuBisCO, catalyzes the fixation of <u>CO2 with Ribulose 1,5-bisphosphate </u>(RuBP).

7 0
3 years ago
After a smaller star runs out of hydrogen it begins to become a :
fomenos

Stars Like the Sun. When the core runs out of hydrogen fuel, it will contract under the weight of gravity. ... The upper layers will expand and eject material that will collect around the dying star to form a planetary nebula. Finally, the core will cool into a white dwarf and then eventually into a black dwarf.

5 0
4 years ago
The theory of evolution through natural selection unites biology in ways that are not usually evident to most peoplE) A non-biol
miv72 [106K]

Answer:

Organisms better adapted to the environment  

Explanation:

According to the evolutionary theory proposed by Charles Darwin in "The Origin of Species" (1859), the fittest organisms are those that are better suited to the environment (i.e., have a higher fitness). These organisms have more chances to survive and reproduce, and thereby they have also more chances to leave their genes in the next generation. This process is the central concept of evolution, and it is called natural selection. In consequence, evolution produces phenotypic changes or 'adaptations' that are inherited by organisms over generations, and certain traits are lost during this process.

3 0
3 years ago
What are the 3 types of substitution mutations?.
loris [4]

Base substitutions, deletions, and insertions are the three different forms of DNA mutations.

A mutation is a long-lasting alteration to the DNA's nucleotide sequence that can occur during replication and/or recombination. Damaged DNA can change by base pair replacement, deletion, or insertion. The majority of the time, mutations are benign, unless they result in tumor growth or cell death. Cells have developed systems for repairing damaged DNA due to the deadly potential of DNA mutations.

Different Mutations

Base substitutions, deletions, and insertions are the three different forms of DNA mutations.

1. Base Replacements

Point mutations are single nucleotide replacements; you may recall the point mutation Glu ——-> Val is the culprit of sickle cell anemia. There are two types of point mutations, the most prevalent of which are.

Transition and Transversion.

Learn more about Base substitutions using this link:

brainly.com/question/15604401

#SPJ4

5 0
1 year ago
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