# Which Has a Higher Metabolic Rate: Yeast Cells or Corn Seedlings?

• dphan
In summary, the question is asking which organism, yeast cells or corn seedling, will have a higher metabolic rate when compared on a mass specific basis. The answer is that the rate of ATP production will decrease in both organisms if the amount of glucose is decreased, until all of the available glucose is used up. To measure metabolic rate, one way is to measure CO2 production, but this may not be accurate for both yeast cells and corn seedlings. The difference between the two lies in the amount of glucose available for each organism to use for ATP production, with the corn seedling having a larger mass and potentially using more glucose than the yeast cell. Therefore, the corn seedling may have a higher metabolic rate on a mass specific basis
dphan
1) Will yeast cells or corn seedling have a higher metabolic rate when compared on a mass specific basis?

2) How will decreasing the amount of glucose affect the rate of ATP production by the cells if the amount of yeast is held constant?

Answer: the rate of ATP production will decrease until all of the glucose available for glycolysis is used up. At this point the ATP production will become zero because no more glucose is available. (is this the correct answer?)

How do you measure metabolic rate? One way is to measure $$CO_2$$ production.

So, the question is asking how are these two different with regard to CO2 production?
(remember - the question is on a mass specific basis, so you count the mass of leaves)
What do leaves do with $$CO_2$$ - that yeast cells do not do?

#2 deals with the amount of glucose each yeast cell can get a hold of to metabolize into ATP.

This is because the number of yeast cells (say 100) stays the same, but the glucose concentration goes down. Each yeast cell has less glucose to use, less glucose=less ATP.

I think the metabolism is better measured by the rate of sugar or starch usage in this case. If I interpret the meaning of 'mass-specific' activity based on mass of organism, the answer is likely straightforward. What percent of the mass of the corn seedling is actually growing vs that of the yeast cell? Does the corn seedling include the monocot?

## 1. What is the main difference between yeast cells and corn seedlings?

The main difference between yeast cells and corn seedlings is their classification as either unicellular or multicellular organisms. Yeast cells are unicellular, meaning they are made up of a single cell, while corn seedlings are multicellular, meaning they are made up of multiple cells that work together to form tissues, organs, and ultimately, a full plant.

## 2. How do yeast cells and corn seedlings reproduce?

Yeast cells reproduce through a process called budding, where a small bud grows out of the parent cell and eventually separates to form a new, genetically identical cell. Corn seedlings, on the other hand, reproduce through sexual reproduction, where male and female reproductive cells combine to form a new, genetically unique plant.

## 3. Can yeast cells and corn seedlings survive in the same environment?

Yes, yeast cells and corn seedlings can survive in the same environment, however, they have different requirements for growth. Yeast cells thrive in a moist, nutrient-rich environment, while corn seedlings need sunlight, water, and nutrients from the soil to grow.

## 4. How do yeast cells and corn seedlings obtain energy?

Yeast cells obtain energy through the process of fermentation, where they break down sugars into energy in the absence of oxygen. Corn seedlings, on the other hand, obtain energy through photosynthesis, where they use sunlight to convert carbon dioxide and water into sugars for energy.

## 5. What are some uses for yeast cells and corn seedlings in scientific research?

Yeast cells and corn seedlings both have important uses in scientific research. Yeast cells are commonly used as model organisms for studying basic cellular processes and as a tool for genetic engineering. Corn seedlings are used in plant biology research to understand plant development and responses to environmental factors, as well as in agricultural research for improving crop yields and resistance to pests and diseases.

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