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FAQs

What does the cell membrane make me think of provide an illustration or analogy? ›

The cell membrane controls what goes in and out of the cell. The cell membrane is like a screen door, because a screen door holds things out but lets air in.

When you think about a membrane, imagine it is like a big plastic bag with some tiny holes. That bag holds all of the cell pieces and fluids inside the cell and keeps any nasty things outside the cell. The holes are there to let some things move in and out of the cell.

What are some of the reasons that organisms need carbon? Carbon is a major component of ALL biomolecules (carbohydrates, lipids, proteins, and nucleic acids) and can form many compounds needed in life. Carbon is often known as a "building block in life" for this reason.

A specific part of a nucleic acid (such as DNA or RNA) experiences a mutation that could lead to a different protein produced. View the illustration below of DNA. Which part of the DNA experiences the mutation? The bases experience the mutation.

Lysosomes are like garbage cans or garbage disposals because materials are put and broken down in them.

The fluid mosaic model describes the structure of the plasma membrane as a mosaic of components —including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character. Plasma membranes range from 5 to 10 nm in thickness.

Carbon accounts for the diversity of biological molecules, which has made possible the wide variety of living things. Proteins, DNA, carbohydrates, and other molecules that distinguish living matter from inorganic material are all composed of carbon atoms bonded to each other and to atoms of other elements.

The unique properties of carbon make it a central part of biological molecules. Carbon binds to oxygen, hydrogen, and nitrogen covalently to form the many molecules important for cellular function. Carbon has four electrons in its outermost shell and can form four bonds.

Life on earth would not be possible without carbon. This is in part due to carbon's ability to readily form bonds with other atoms, giving flexibility to the form and function that biomolecules can take, such as DNA and RNA, which are essential for the defining characteristics of life: growth and replication.

In-vitro, animal, and human investigations have identified several classes of environmental chemicals that modify epigenetic marks, including metals (cadmium, arsenic, nickel, chromium, methylmercury), peroxisome proliferators (trichloroethylene, dichloroacetic acid, trichloroacetic acid), air pollutants (particulate ...

What can alter your DNA? ›

Environmental exposure to certain chemicals, ultraviolet radiation, or other external factors can also cause DNA to change. These external agents of genetic change are called mutagens.

Inherited disorders are caused by gene mutations. These include disorders such as cystic fibrosis, sickle cell disease, and Tay-Sachs disease. Chromosomal abnormalities occur when there are missing or extra chromosomes or pieces of chromosomes.

The water balloon analogy helps visualize the structure and behavior of the cell membrane. The balloon's thin rubber or plastic component is analogous to the thin and flexible cell membrane. It functions as a semi-permeable membrane, allowing materials to pass through the boundary.

The walls around the school are like the cell membrane because the walls protect and keep all of the kids and teachers at the school safe. Just like what the cell membrane does for the organelles.

Ocean Analogy

Although the cell membrane is a tough barrier, it is actually quite fluid. The fats, or phospholipids, that make up the membrane drift around like a sea. Proteins and carbohydrates also float along the phospholipid sea, drifting unless they are anchored to the membrane.

A cell can be thought of as a "factory," with different departments each performing specialized tasks. A cell's plasma membrane regulates what enters or leaves the cell. The CYTOPLASM includes everything between the cell membrane and the nucleus.