Cells

A:

Sperm cells have tails primarily for the purpose of swimming. They must move from the vagina up through the female reproductive system.

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  • How do cells use energy?

    Q: How do cells use energy?

    A: Cells use energy in order to grow, regulate metabolism and reproduce. This energy is obtained from a source such as food molecules or light from the sun, and through processes like glycolysis, the citric acid cycle and oxidative phosphorylation, an energy-rich molecule is then created. The cell can then use the energy in the protein molecule to help it function.
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  • Why are cells called the basic unit of life?

    Q: Why are cells called the basic unit of life?

    A: Cell are considered the basic unit of life because all life forms are composed of them. Some forms of life are made of one cell; others contain trillions.
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  • What are the differences between plant and animal cells?

    Q: What are the differences between plant and animal cells?

    A: There are many differences between plant and animal cells, but one of the most obvious differences is that plant cells have a cell wall. Animal cells do not have a cell wall.
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  • What is the function of cytoplasm?

    Q: What is the function of cytoplasm?

    A: Cytoplasm has many functions in both prokaryotic and eukaryotic cells, including aiding in the movement of cellular materials and transporting the genetic material and products of cellular respiration. It also acts as a liquid medium to suspend organelles and helps cells expand during reproduction.
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  • Why do cells divide?

    Q: Why do cells divide?

    A: Cells divide as a way of reproducing or growing or to create sex cells. Cells can only reach a certain size due to a lack of balanced growth between their parts, so they have to divide once they reach a certain point. Sex cells, such as eggs and sperm, are only created through specialized cell division.
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  • What is a cell membrane?

    Q: What is a cell membrane?

    A: A cell membrane is a thin layer that acts as a barrier that separates an individual cell or a cellular compartment from other surrounding structures. This dynamic layer plays an essential part in the transport of ions and nutrients.
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  • Where does translation occur?

    Q: Where does translation occur?

    A: Translation occurs in the cell, specifically in the cytoplasm. Translation is one of many steps in the creation of protein which is needed to fuel the body.
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  • Why does a sperm cell have a tail?

    Q: Why does a sperm cell have a tail?

    A: Sperm cells have tails primarily for the purpose of swimming. They must move from the vagina up through the female reproductive system.
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  • What is the significance of mitosis?

    Q: What is the significance of mitosis?

    A: Mitosis' significance is cell division, which enables an organism to grow and reproduce. During mitosis, a single cell divides and produces two identical daughter cells. Each cell contains the same genetic material and chromosome number as the original cell.
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  • Why is RNA important to the cell?

    Q: Why is RNA important to the cell?

    A: RNA is important to cells because it relays information encoded in DNA to tiny organs within the cell, called ribosomes, which produce protein according to the RNA's instructions. RNA is thus vital to the basic functioning of the cell.
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  • Where does meiosis take place?

    Q: Where does meiosis take place?

    A: For humans, meiosis occurs in the reproductive organs of both males and females. Both genders make use of meiosis to produce their respective gametes.
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  • What are the similarities between plant and animal cells?

    Q: What are the similarities between plant and animal cells?

    A: Plant and animal cells have many of the same organelles, they both divide to reproduce, and they share similar basic structure. Scientists cite these similarities as evidence that all life evolved from a common ancestor.
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  • Why is iodine stain used on onion cells?

    Q: Why is iodine stain used on onion cells?

    A: Iodine is often used to stain onion cells before microscopic examination to enhance the visibility of the cells. Many cells, including those of onions and other vegetables, are often transparent. When unstained cells are viewed under a microscope, the light passes directly through the cells’ various structures revealing little to no detail. By contrast, when iodine or other dyes are used, the cell absorbs the dye into its various organelles and structures, which blocks the light and allows the observer’s eye to detect the details of the cell.
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  • What is the function of the cell body?

    Q: What is the function of the cell body?

    A: The main function of the cell body of a neuron is to integrate synaptic information and transmit this information to other cells via the axon. The cell body also completes a variety of biochemical processes to keep the neuron functioning properly.
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  • What organelle is the site of protein synthesis?

    Q: What organelle is the site of protein synthesis?

    A: There are four organelles found in eukaryotic cells that aid in the synthesis of proteins. These organelles include the nucleus, the ribosomes, the rough endoplasmic reticulum and the Golgi apparatus. All of these organelles help produce and process proteins, but only the ribosomes actually piece together amino acids into proteins.
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  • What makes plant and animal cells different?

    Q: What makes plant and animal cells different?

    A: There are several key differences between plant and animal cells, such as cell wall structure, presence or absence of plastids, lysosomes and centrioles and shape of vacuoles. These characteristics are the primary and most distinct differences between plant and animal cells. However, they only exist in organisms classified as eukaryotic, and occur primarily in central organelles.
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  • Why are cells so small?

    Q: Why are cells so small?

    A: Brooklyn College explains that cells are small because they must have a large surface area relative to the amount of volume they contain to function properly. As a sphere grows larger, its volume increases much more rapidly than its surface area does. This presents logistical problems for the cell, as it tries to transport resources and products through a large volume without the resources available via a large surface.
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  • What are analogies for chloroplasts?

    Q: What are analogies for chloroplasts?

    A: According to Online Digital Education Connection, analogies for chloroplasts are power plants that imitate the function of chloroplasts in a plant cell to utilize solar energy or light in the processing of food for plant cells. Score Science lists solar energy plants as city analogies for chloroplasts.
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  • What is the control center of a cell?

    Q: What is the control center of a cell?

    A: The nucleus is the control center of a cell. The nucleus controls the cell's growth and reproduction and contains the cell's DNA.
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  • How do plant, animal and bacterial cells compare in size?

    Q: How do plant, animal and bacterial cells compare in size?

    A: Plant cells and animal cells are much larger than bacterial cells. On average, animals cells range from 10 to 30 micrometers in length, while plant cells average between 10 and 100 micrometers in length. By comparison, bacterial cells are less than 2 micrometers long.
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  • What are the longest cells in the human body?

    Q: What are the longest cells in the human body?

    A: The longest cells in the human body are neurons. Neurons are cells within the nervous system and carry messages throughout the body.
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