Cell Structure and Organelles Purpose To study the structure and function of organelles in eukaryotic plant and animal cells. ... The function of cell membrane is that defines cell boundary; regulates molecule passage into and out of cells. 2. ... The single membrane is known in plant cells as a tonoplast. ... The function of cilia and flagella is the movement of cell. 22. ... It provides structural support to the plant cells. ...

• Word Count: 1218
• Approx Pages: 5
• Grade Level: High School

Certain advantages are enabled through this, for example: cells are able to function as larger muscle cells. ... Cell streaming within plants, which brought about through these actin-myosin interactions, speeds the distribution of materials within the cell. ... Unlike the prokaryotic cell which must commit itself completely to one function, depending on the environment, the eukaryotic cell is able to carry out these opposing simultaneous activities independent of the cells current external environment. ... The activator-enhancer complex involved in the process of eukaryotic protein synthesis,...

• Word Count: 1099
• Approx Pages: 4
• Has Bibliography
• Grade Level: Graduate

Important Facts the smallest unit of life is the cell instructions for development are contained in DNA collectively, all of the chemical processes in a cell are called metabolism producers often obtain energy from the sun homeostasis refers to the ability to maintain a constant internal environment cells in domains archaea and eubacteria lack nucleii plants are multicellular producers an educated guess might be called a hypothesis science is based on evidence philosophy is not a step in the scientific method an atom is the smallest unit of substance that retains the properties of the subst...

• Word Count: 10700
• Approx Pages: 43
• Grade Level: High School

They are an important source of energy for plants, animals and humans. ... The protein hemoglobin carries oxygen to cells. ... They are a major constituent of most cells. ... RNA enables a cell to use the DNA blueprints to build proteins. ... Examples of steroids are cholesterol, which functions in many ways. ...

• Word Count: 728
• Approx Pages: 3
• Grade Level: Undergraduate

Also, organic compounds are responsible for governing ion transport channels in the cell, which function in carrying information from one cell to another, and mediating cell-to-cell communication. ... Agricultural and food chemistry uses both organic and analytical methods to continually develop new research regarding plant toxins, contaminates and additives, amino acids, foreign material, pesticide residue, etc. ...

• Word Count: 469
• Approx Pages: 2
• Grade Level: Undergraduate

Regardless of their route of entry, toxicants must first pass through a cell membrane or cell wall separating the external environment from the internal biological environment. The major barrier of uptake for a toxicant is the cell membrane or cell wall at the site of uptake, for example; cell membrane of gastrointestinal tract or skin, epithelial cell of gill and tracheae, or cell wall of plant root. ... These toxins pose many different health risks to humans as well as plants and animals. ... Benzene crosses the cell wall or membrane through passive diffusion. ... The liver plays a major ...

• Word Count: 1197
• Approx Pages: 5
• Has Bibliography
• Grade Level: Undergraduate

In plants the pectin naturally functions as a "glue" to hold the cell wall together and also to "glue" cells together (the middle lamella, the bit between neighbouring cells is rich in pectin so) degrading the pectin enzymatically also makes it easier to digest the cellulose and other molecules as well as releasing water (juice). ...

• Word Count: 530
• Approx Pages: 2
• Grade Level: Undergraduate

The earliest cells were prokaryotes (heterotrophs taking in organic molecules from their environment), and eukaryotes eventually formed from these cells. From there, jellyfish, algae, and other marine invertebrates were formed, and from then on other animals and plants evolved to the species we have now by the processes of Natural Selection (traits that are favorable to the environment that an organism is in are passed on to the offspring), and speciation (the process of forming species). ... Only if all the parts of a cell were created at the same time would it function properly. ...

• Word Count: 862
• Approx Pages: 3
• Grade Level: High School

The function is unknown. The mutated prion version of the protein accumulates within nerve cells, forming aggregates that kill cells. ... Proteins are capable of a wide variety of functions and activities. ... This sequence of amino acids is very important in both the structure and function of the proteins. ... The molecule blocked any signals from immune cells to the spleen and lymph's immune cells. ...

• Word Count: 2559
• Approx Pages: 10
• Grade Level: High School