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Which of the following reasons could explain whyChlamydomonas can’t grow at 40°C?A. The rate of molecular motion is too high at 40°C tosustain life

Question

Which of the following reasons could explain why Chlamydomonas can’t grow at 40°C?

A. The rate of molecular motion is too high at 40°C to sustain life

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Solution

Chlamydomonas is a type of green algae that is sensitive to temperature changes. Here are some possible reasons why it can't grow at 40°C:

A. The rate of molecular motion is too high at 40°C to sustain life: This could be a valid reason. High temperatures can increase the rate of molecular motion, which can disrupt cellular processes. For example, proteins, which are crucial for most biological processes, can denature (lose their structure) at high temperatures, rendering them non-functional.

B. Damage to cellular components: High temperatures can cause damage to cellular components, including proteins and membranes. This can disrupt cellular functions and prevent growth.

C. Inability to maintain homeostasis: Organisms need to maintain a stable internal environment to survive. High temperatures can disrupt this balance, leading to conditions that are not conducive to growth.

D. Inhibition of photosynthesis: Chlamydomonas is a photosynthetic organism. High temperatures can inhibit photosynthesis by damaging the photosynthetic machinery or by causing excessive water loss.

E. Changes in gene expression: Temperature changes can affect gene expression. Some genes that are essential for growth might be downregulated at high temperatures, while others that are involved in stress responses might be upregulated. This shift in gene expression can inhibit growth.

Please note that these are potential reasons, and the actual reason can vary depending on the specific strain of Chlamydomonas and the specific conditions.

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