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katrin [286]
3 years ago
8

When chromosomes become visible at the beginning of the cell division, wat does each chromosome consist of?

Biology
1 answer:
polet [3.4K]3 years ago
6 0
They consist of identical sister chromatids
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Marina CMI [18]

Answer:1. Pyruvate carboxylase

2. Phosphoenol pyruvate carboxy kinase

Explanation:

The conversion of pyruvate to phosphoenol pyruvate is catalyzed by two enzymes Pyruvate carboxylase and phosphoenol pyruvate carboxy kinase

1. Pyruvate carboxylase reaction

Pyruvate in the cytoplasm enters the mitochondria. Then, carboxylase of pyruvate to oxaloacetate is catalysed by a mitochondrial enzyme, pyruvate carboxylase. It needs the co-enzymes biotin and ATP.

The oxaloacetate formed has to be transported from the mitochondrial to the cytosol because further reaction of gluconeogenesis are taking place in cytosol.

2. Phoaphoenol pyruvate carboxy kinase (PEPCK)

In the cytoplasm, PEPCK enzyme then converts oxaloacetate to phoaphoenol pyruvate by removing a molecule of CO2. GTP or ITP donates the phosphate group.

The net effect of these two reactions is the conversion of pyruvate to phoaphoenol pyruvate. This circumverts the irreversible step in glycolysis catalyzed by pyruvate kinase (step 9 if glycolysis)

5 0
3 years ago
Name one feature that the transition of RNA to DNA and proteins, and the transition of prokaryotic to eukaryotic unicellular org
Norma-Jean [14]

Answer:

It is only nucleotide phosphates e.g. adenosine triphosphate (ATP) that stores energy for all cell's use. It is also a molecule that is similar to one of the nucleic acids in DNA and RNA.

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3 years ago
The apical ends of intestinal cells face the intestinal channel and have long processes that facilitate the absorption of nutrie
Serggg [28]

Answer:

microvilli, actin filaments

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The apical ends of intestinal cells face the intestinal channel and have long processes that facilitate the absorption of nutrients. the name of these processes is microvilli and actin filaments from the cytoskeletal element forms their internal skeleton.

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Why we should understand the global environmental problems??​
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Environmental awareness is an incredibly important part of our lives. In order to protect the sustainability of the planet, everyone needs to commit to becoming more environmentally aware. Environmental degradation is detrimental and is jeopardising the long-term health and security of animals, plants and humans.

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describe how turning off the electric current in an industrial electromagnet affects its magnetic field
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It makes it stronger.

- I hope this helps! (:
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3 years ago
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