Uzma Chatgpt Answers - chapter 1 example of question including gloassary medical terms
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Questions and Answers

Which statement best describes a fundamental property of cells?

  • Cells can only originate from existing cells. (correct)
  • All cells have a nucleus.
  • Cells do not maintain a distinct internal environment.
  • Cells are generally of the same size and shape.

    • What is considered the basic unit of life?

  • Organ
  • Cell (correct)
  • Tissue
  • Molecule

    • The theory that all living things are composed of cells is known as the:

  • Cellular theory. (correct)
  • Organismal theory.
  • Atomic theory.
  • Evolutionary theory.

    • Which type of microscope would be best for studying the detailed structure of the surface of a cell?

    <p>Scanning electron microscope (C)</p> Signup and view all the answers

    What is the primary role of DNA in cells?

    <p>Genetic information storage (C)</p> Signup and view all the answers

    Which of the following is a characteristic of prokaryotic cells?

    <p>They lack a defined nucleus. (B)</p> Signup and view all the answers

    In the context of cell theory, which statement is accurate?

    <p>Cells are the smallest entities considered to be alive. (A)</p> Signup and view all the answers

    Which organelle is commonly referred to as the 'powerhouse of the cell'?

    <p>Mitochondrion (D)</p> Signup and view all the answers

    Cellular membranes are primarily composed of:

    <p>Phospholipids and proteins. (C)</p> Signup and view all the answers

    The fluid mosaic model describes the cell membrane as:

    <p>A dynamic structure with a mixture of lipids and proteins. (B)</p> Signup and view all the answers

    Which organelles are involved in the process of protein synthesis?

    <p>Ribosomes and endoplasmic reticulum (B)</p> Signup and view all the answers

    What is the main function of the cytoskeleton in a cell?

    <p>Structural support and movement (C)</p> Signup and view all the answers

    In which part of a eukaryotic cell is the DNA found?

    <p>Nucleus (C)</p> Signup and view all the answers

    What type of cells lack a membrane-bound nucleus?

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

    Which statement best describes viruses?

    <p>Viruses require a host cell to replicate. (D)</p> Signup and view all the answers

    The endosymbiotic theory is primarily associated with the origin of:

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

    What is the primary barrier that separates the interior of the cell from the external environment?

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

    Which cell component is primarily responsible for breaking down worn-out cellular structures?

    <p>Lysosomes (A)</p> Signup and view all the answers

    Which process involves the movement of substances across the cell membrane against a concentration gradient?

    <p>Active transport (D)</p> Signup and view all the answers

    Photosynthesis primarily occurs in which type of cell?

    <p>Plant cells (C)</p> Signup and view all the answers

    Which cellular structure is involved in the modification, sorting, and packaging of proteins?

    <p>Golgi apparatus (A)</p> Signup and view all the answers

    What is the primary role of the smooth endoplasmic reticulum?

    <p>Lipid synthesis and detoxification (B)</p> Signup and view all the answers

    Which component is responsible for the selective permeability of the cell membrane?

    <p>Phospholipids (C)</p> Signup and view all the answers

    Cellular respiration, a process that generates ATP, primarily takes place in the:

    <p>Mitochondria (D)</p> Signup and view all the answers

    The process by which a cell engulfs a solid particle is known as:

    <p>Phagocytosis (C)</p> Signup and view all the answers

    Which type of cell junctions allow for direct communication between adjacent animal cells?

    <p>Gap junctions (C)</p> Signup and view all the answers

    Which molecule serves as the 'genetic blueprint' in living organisms?

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

    In a cell, ribosomal RNA (rRNA) is primarily found in the:

    <p>Ribosomes (C)</p> Signup and view all the answers

    Which process describes the movement of water across a semi-permeable membrane?

    <p>Osmosis (A)</p> Signup and view all the answers

    The cell theory states that:

    <p>All living things are made of cells and cell products. (C)</p> Signup and view all the answers

    What is α-actinin?

    <p>An actin-binding protein that cross-links actin filaments into contractile bundles. (C)</p> Signup and view all the answers

    What is an α-helix?

    <p>A coiled secondary structure of a polypeptide chain formed by hydrogen bonding. (B)</p> Signup and view all the answers

    What is an ABC transporter?

    <p>A membrane transport protein with a conserved ATP binding domain. (C)</p> Signup and view all the answers

    What is abl?

    <p>A proto-oncogene encoding a tyrosine kinase, activated in chronic myeloid leukemia. (B)</p> Signup and view all the answers

    What is abscisic acid?

    <p>• A plant hormone (C)</p> Signup and view all the answers

    What is actin?

    <p>A protein that polymerizes to form cytoskeletal filaments. (C)</p> Signup and view all the answers

    What is the role of an actin-binding protein?

    <p>It binds actin and regulates the assembly, disassembly, and organization of actin filaments. (B)</p> Signup and view all the answers

    What is an actin bundle?

    <p>Actin filaments that are cross-linked into closely packed arrays. (C)</p> Signup and view all the answers

    What does an actin-bundling protein do?

    <p>It cross-links actin filaments into bundles. (B)</p> Signup and view all the answers

    What is an actin network?

    <p>Actin filaments that are cross-linked into loose three-dimensional meshworks. (B)</p> Signup and view all the answers

    What is an action potential?

    <p>A change in membrane potential that occurs in nerve cells. (B)</p> Signup and view all the answers

    What is activation energy?

    <p>The energy required to raise a molecule to its transition state to undergo a chemical reaction. (B)</p> Signup and view all the answers

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