Cell Biology Quizzes Online & Trivia

Large central vacuole can only be found in plant cell not in animal cell. And also chlorophyll is found in the chloroplast which is responsible for photosynthesis in the plant and we all know plant cell have cell not animals. None of the answers is correct.

B can be a correct answer too because animal cells also do not have cell walls.

Plasma membrane & cell membrane that protects the cell's inside.

Tell me what animal cell has a cell wall hahahahah

The answer is A. The thin, flexible barrier around a cell called plasma membrane. Cells have many different purposes and many different parts which allow cells to go to certain areas to perform numerous varying tasks. Chloroplast is not found in humans but is responsible for creating energy from sunlight. Many things also go into and come out of cells and the cell membrane acts as kind of a security guard making sure that everything that comes into the cell should be there and anything coming out of the cell should be leaving. The plasma membrane is a thin barrier that protects the cell by surrounding it and performing functions necessary to the survival of the cell.

Endocytosis is the process of bringing something into a cell by forming a plasma membrane around it to allow it to pass through the membrane. The prefix “endo” means “bring into”, and cytosis is anything related to the cell. To bring something into the cell this way allows it to be much bigger than the holes in the cell membrane. The small holes allow small particles, like nutrients and salts, to pass through with relatively little issue. If something bigger wants to pass through the cell membrane, the cell needs to help it out. It does so by basically creating an envelope around the item. Then, it drags the plasma envelope in, passes it through the membrane, and pops it out into the cell plasma and it’s all done.

There are many theories in science. Today, this theory of the cell is believed and accepted by all in the science world. The cell theory means that living things are made up of cells. Cells are the tiniest unit of the living things. Cells do certain things. The cell theory includes three main things about it. First, the living things have at least one cell in them. Second, the cell is the smallest part of the structure in these living things. Last, the cells are created from other cells. They can reproduce. However, all cells do not contain the same organelles. They contain different organelles. This depends on the type of cells. There are two main types which are prokaryotes and eukaryotes.

Most plant cells do not have centrioles. These are tubular fibers that are used to help the cell divide at the end of mitosis. It is a spindle-like fibrous tube that expands from one side of the cell to the other. Then, they slowly contract and help the cytoplasm and chromosomes come to the right side of the cell for each cell. The plant cell will have the rest of these organelles, though. The cell wall keeps the plant cell stiff and stern. It helps plants stand stiff. The chloroplasts are filled with chlorophyll, which gives leaves and other green plants their green coloring. The nucleus is the most important organelle of them all. It houses the chromosomes and the DNA. It’s basically the HQ of the cell.

The correct answer to this question is D, DNA Strands. DNA was first isolated in 1869 by Friedrich Miescher and first identified in 1953 by Francis Crick and James Watson. DNA stands for deoxyribonucleic acid. It is a molecule which has two chains coiled around each other. These coils form a double helix. DNA is important because it carries genetic instructions. These are used to help organisms and viruses grow, develop, function, and reproduce. Unable to be viewed by the naked eye or a light microscope, DNA strands can be viewed under an electron microscope, for it has a higher resolution.

The false statement here is that cholesterol damages the plasma membrane. The fluid mosaic model is the most recent model put forth for how the cell gets things in and out. This model, simply put, states that the cell membrane is a layer of lipids that have larger protein channels at specific intervals. These larger protein channels allow larger molecules to come in and out of the cell without rupturing the cell membrane. That’s why cholesterol is able to get through the cell membrane without damaging it. The lipid layer allows smaller particles to get through the cell membrane without damaging it, and without needing extra help to get through. This works because the lipids form a small circle around the item, and help it through the middle layer.

1. Rough endoplasmic reticulum2. Rough endoplasmic reticulum3. Rough ER4. Rough ER

Acts as semi-permeable barrier to the outside of the cell. Allows flow of certain molecules in and out as needed.