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Tcecarenko [31]
3 years ago
12

Most Archaeans lack a ______ cell wall.

Biology
1 answer:
Morgarella [4.7K]3 years ago
6 0
Most Archaens lack peptidoglycan<em> </em>a.k.a murein in their cell wall. Peptidoglycans help maintain the strength of the cell wall as well as repel the osmotic pressure in the cytoplasm. A common misconception of the use of peptidoglycans is that it gives the cell shape. However, peptidoglycans only improve the structure of the cell wall by strengthening it.
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Drag the correct word from the left into the sentence on the right to complete each sentence. In anabolic reactions that involve
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Answer:

The correct matches are:

  1. In anabolic reactions that involve the synthesis of a large molecule from smaller precursor molecules, NADH and ATP are consumed when they provide the needed electrons or energy.
  2. In catabolic reactions that involve the breakdown of a molecule into smaller subunits, such as glucose to pyruvate, NADH and ATP are produced.
  3. In the reaction Pyruvate +NADH-Lactate +NAD, pyruvate is being reduced.
  4. In the reaction Pyruvate NADH-Lactate +NAD, NADH is being oxidized.

Explanation:

  • Being involved in synthesis, anabolic reactions require energy in the form of energy storing molecules such as NADH and ATP. Anabolic processes utilize energy produced by the catabolism of complex compounds.
  • Catabolic processes produce energy or energy storing compounds by breaking down complex substances into simpler ones. All steps of cellular respiration are catabolic processes since they generate energy in the form of ATP or energy yielding molecules such as NADH and FADH2.
  • Anaerobic respiration takes place during intense physical activity due to which adequate oxygen does not reach the cells. Insufficient oxygen shuttles the pyruvate molecules produced by glycolysis into the lactic acid pathway that reduces pyruvate into lactic acid.
  • Since, NADH is donating its H+, it is being oxidized to NAD+.
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The food chain is a system in which food is connected with the ecosystem. Ex:composers, producers, decomposers,etc.
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The answer is D. NADH to NAD+

When no oxygen is present, anaerobic respiration occurs.It is the only way to produce ATP in this condition.NAD+ is necessary because it is converted into NADH and at the same time ADP is converted to ATP in the reaction of pyruvate synthesis from glucose.Therefore, NADH must be converted to NAD+ in order to have NAD+ always present in the cell.
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3 years ago
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