Atomic Structure and Cellular Organelles
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Questions and Answers

What is the main purpose of glycolysis?

  • To consume oxygen
  • To generate a large amount of ATP
  • To produce carbon dioxide
  • To produce pyruvate from glucose (correct)
  • Where does the electron transport chain occur?

  • On ribosomes
  • In the mitochondria (correct)
  • In the cytoplasm
  • In the nucleus
  • Which of the following molecules is NOT directly involved in the citric acid cycle?

  • NADH
  • ATP
  • Acetyl-CoA
  • Pyruvate (correct)
  • What is the purpose of meiosis?

    <p>To produce gametes with half the number of chromosomes (D)</p> Signup and view all the answers

    What is the role of electrons in cellular respiration?

    <p>To carry energy from glucose to ATP (D)</p> Signup and view all the answers

    During translation, what molecule functions as a template for protein synthesis?

    <p>mRNA (B)</p> Signup and view all the answers

    Which of the following statements about DNA is TRUE?

    <p>DNA contains the sugar ribose (C)</p> Signup and view all the answers

    What is the function of ribosomes?

    <p>To synthesize proteins (B)</p> Signup and view all the answers

    Which of the following statements accurately describes the base pairing rules in DNA?

    <p>Adenine pairs with thymine, and cytosine pairs with guanine (A)</p> Signup and view all the answers

    Which of the following BEST describes the role of valence electrons in chemical reactions?

    <p>They are involved in the formation of chemical bonds (D)</p> Signup and view all the answers

    Flashcards

    Parts of an Atom

    Atoms are made of protons, neutrons, and electrons; protons are positive, neutrons are neutral, and electrons are negative.

    Function of Electrons

    Electrons participate in chemical reactions by forming bonds between atoms.

    Valence Electrons

    Valence electrons are the outermost electrons responsible for chemical bonding and reactivity.

    Polar Water

    Water is polar because it has a partial positive charge on one side and a partial negative charge on the other.

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    Functional Unit of Life

    The cell is considered the functional unit of life because it is the smallest structure that can perform all life processes.

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    Glycolysis

    Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing small amounts of ATP.

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    Citric Acid Cycle

    The citric acid cycle occurs in the mitochondria and processes acetyl-CoA to produce ATP and electron carriers.

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    DNA Structure

    DNA is a double-stranded molecule made of nucleotides, which include a sugar, phosphate, and nitrogenous bases.

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    Mitosis Purpose

    The purpose of mitosis is to divide a cell's nucleus and genetic material to produce two identical daughter cells.

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    Translation

    Translation is the process in which ribosomes synthesize proteins using mRNA as a template.

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    Study Notes

    Atomic Structure and Subatomic Particles

    • Atoms are composed of subatomic particles: protons, neutrons, and electrons
    • Protons and neutrons are located in the nucleus
    • Electrons orbit the nucleus
    • Protons have a positive charge, electrons have a negative charge, and neutrons are neutral
    • Electrons play a role in chemical reactions by transferring or sharing electrons

    Valence Electrons

    • Valence electrons are electrons in the outermost shell of an atom
    • They are important as they determine the chemical properties of an atom, including how it will bond with other atoms

    Water

    • Water is a polar molecule due to the unequal sharing of electrons between oxygen and hydrogen atoms

    Functional Unit of Life

    • The functional unit of life is the cell

    Cell Compartments

    • Cells have compartments called organelles
    • Major compartments in cells are the cytoplasm and nucleus (not mentioned, but inferred)

    Cellular Organelles: Ribosomes, Golgi Apparatus, Mitochondria

    • Ribosomes are responsible for protein synthesis
    • Golgi apparatus modifies, sorts, and packages proteins
    • Mitochondria are involved in cellular respiration and energy production

    Cellular Respiration

    • Cellular respiration is the process by which cells break down glucose to produce ATP (energy)
    • The equation for cellular respiration is a key concept and should be understood: C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP

    Glycolysis

    • Glycolysis is the first step in cellular respiration
    • It takes place in the cytoplasm
    • Glycolysis does not require oxygen
    • Glucose is converted to a 3-carbon molecule (pyruvate)

    Citric Acid Cycle

    • The citric acid cycle occurs in the mitochondria
    • Pyruvate is not fed directly into the citric acid cycle; it is first converted to AcetylCoA

    Electron Transport Chain

    • Electron transport chain is a series of proteins located in the mitochondria
    • It is crucial for ATP production during cellular respiration

    ATP Production

    • Most ATP is produced in the mitochondria via cellular respiration.

    DNA and Genes

    • DNA is a double-stranded molecule
    • The structure of DNA includes base pairing (adenine with thymine, guanine with cytosine)
    • Genes are segments of DNA that contain the instructions for building proteins
    • A chromosome is packaged DNA

    DNA Replication, Transcription, Translation

    • DNA replication creates a copy of a DNA molecule
    • Transcription is the process where DNA is converted to RNA
    • Translation is where RNA directs the synthesis of proteins.
    • Protein synthesis takes place on the ribosomes.

    Mitosis and Meiosis

    • Mitosis is cell division for growth and repair, resulting in two identical cells
    • Meiosis is cell division for sexual reproduction, resulting in four non-identical cells; each with half the number of chromosomes (haploid)
    • Mitosis happens to body cells, and meiosis takes place in reproductive cells
    • Cells are called diploid when they have a full set of chromosomes
    • RNA is not found in the middle of the DNA double helix

    Chromosomes

    • DNA is wrapped around proteins called histones

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    Description

    This quiz explores atomic structure, subatomic particles, and the significance of valence electrons. It also covers water as a polar molecule and the structure of cells, including their organelles. Test your understanding of these essential concepts in biology and chemistry!

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