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Chapter 4: Problem 7

In order to obtain some materials and remove waste, what process is used by prokaryotes? a. cell division b. diffusion c. flagellar motion d. ribosomes

Short Answer

Expert verified
b. diffusion

Step by step solution

01

- Understanding the question

Identify what the question is asking: Which process do prokaryotes use to obtain materials and remove waste?
02

- Reviewing the options

Review the provided options:a. cell divisionb. diffusionc. flagellar motiond. ribosomes
03

- Analyzing each option

Analyze each option to determine if it fits the process of obtaining materials and removing waste:a. Cell division: Prokaryotes divide by binary fission, but this is not related to the immediate transport of materials or waste removal.b. Diffusion: This is the process of moving molecules from higher to lower concentration. Prokaryotes use diffusion to transport nutrients into the cell and waste products out.c. Flagellar motion: This is used for movement, not for material transport or waste removal.d. Ribosomes: Ribosomes are involved in protein synthesis, not in material transport or waste removal.
04

- Selecting the correct answer

Based on the analysis, diffusion (option b) is the process used by prokaryotes to obtain materials and remove waste.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Prokaryotic Cells
Prokaryotic cells are single-celled organisms without a nucleus or other membrane-bound organelles. They are typically smaller and simpler than eukaryotic cells. Prokaryotes include bacteria and archaea.

Key features of prokaryotic cells include:
  • A cell membrane that surrounds the cell
  • Genetic material (DNA) that is freely floating within the cell in a region called the nucleoid
  • Cytoplasm, a jelly-like substance where cellular processes occur
  • Ribosomes for protein synthesis
Prokaryotic cells have various shapes, but they all use certain processes, such as diffusion, to survive and perform necessary functions like obtaining nutrients and removing waste.
Material Transport
In prokaryotic cells, transporting materials is essential for cellular function and survival. The primary process for material transport in prokaryotes is diffusion.

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. It doesn鈥檛 require energy, making it an efficient way for cells to gain necessary molecules.

Examples of materials transported by diffusion include:
  • Oxygen, which is needed for cellular respiration
  • Nutrients such as glucose and amino acids
  • Water, by osmosis, a special type of diffusion for water molecules
Diffusion helps maintain a balance of molecules inside the cell and is crucial for supplying the cell with important nutrients for growth and function.
Waste Removal
For prokaryotic cells, removing waste is critical to prevent the accumulation of harmful substances. Just as they use diffusion to intake materials, they also rely on diffusion for waste removal.

Cells produce waste products such as carbon dioxide and other metabolic byproducts. These wastes must be efficiently expelled to maintain cellular health.

Here are key points about waste removal in prokaryotic cells:
  • Waste molecules move from the inside of the cell (where they are in higher concentration) to the outside (where the concentration is lower)
  • The process does not require energy, as it is a passive movement
  • Maintaining a proper waste removal system through diffusion helps keep the cell environment stable and conducive to various cellular functions
Without effective waste removal, cells could become toxic and die, so diffusion is a vital process for prokaryotic survival.

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Most popular questions from this chapter

In which human tissues would you find desmosomes? Think of tissues that undergo strong mechanical stress and must be held together with some flexibility. a. bone cells and cartilage cells b. muscle cells and skin cells c. nerve cells and muscle cells d. secretory cells and muscle cells

Which organelles would be present in high numbers in the leg muscles of a marathon runner? a. centrioles b. chloroplasts c. mitochondria d. peroxisome

In plant cells, the function of the lysosomes is carried out by what? a. nuclei b. peroxisomes c. ribosomes d. vacuole

The major role of the cell wall in bacteria is protecting the cell against changes in osmotic pressure, pressure caused by different solute concentrations in the environment. Bacterial cells swell, but do not burst, in low solute concentrations. What happens to bacterial cells if a compound that interferes with the synthesis of the cell wall is added to an environment with low solute concentrations? a. Bacterial cells will shrink due to the lack of cell wall material. b. Bacterial cells will shrink in size. c. Bacterial cells may burst due to the influx of water. d. Bacterial cells remain normal; they have alternative pathways to synthesize cell walls

What are the advantages and disadvantages of light microscopes? What are the advantages and disadvantages of electron microscopes? a. Advantage: In light microscopes, the light beam does not kill the cell. Electron microscopes are helpful in viewing intricate details of a specimen and have high resolution. Disadvantage: Light microscopes have low resolving power. Electron microscopes are costly and require killing the specimen. b. Advantage: Light microscopes have high resolution. Electron microscopes are helpful in viewing surface details of a specimen. Disadvantage: Light microscopes kill the cell. Electron microscopes are costly and low resolution. c. Advantage: Light microscopes have high resolution. Electron microscopes are helpful in viewing surface details of a specimen. Disadvantage: Light microscopes can be used only in the presence of light and are costly. Electron microscopes uses short wavelength of electrons and hence have lower magnification. d. Advantage: Light microscopes have high magnification. Electron microscopes are helpful in viewing surface details of a specimen. Disadvantage: Light microscopes can be used only in the presence of light and have lower resolution. Electron microscopes can be used only for viewing ultra-thin specimens.
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