Protein Synthesis and Endomembrane System
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Questions and Answers

What is the functional and morphological unit of living organisms?

  • Prokaryotic cell
  • Nucleus
  • Eukaryotic cell (correct)
  • Plasma membrane

What differentiates eukaryotic cells from prokaryotic cells?

  • Ability to form tissues
  • Presence of plasma membrane
  • Complex DNA in the nucleus (correct)
  • Larger size

What do cells that resemble each other, or serve the same purpose, form when grouped together?

  • Plasma membranes
  • Tissues (correct)
  • Organelles
  • Cytoplasm

Which organelle contains the genetic material in a cell?

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

What is the function of the rough endoplasmic reticulum (RER) in a cell?

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

Which part of the cell contains the cytoplasm, organelles, and the nucleus?

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

Where are proteins synthesized in the cell?

<p>Rough Endoplasmic Reticulum (A)</p> Signup and view all the answers

Which organelle is responsible for lipids synthesis and storage of calcium in the cell?

<p>Smooth Endoplasmic Reticulum (B)</p> Signup and view all the answers

What is the function of the Golgi Apparatus?

<p>Processes and packages proteins (A)</p> Signup and view all the answers

What is the main function of lysosomes in the cell?

<p>Degrading different types of molecules (B)</p> Signup and view all the answers

What maintains a pH of about 5 in the interior of lysosomes?

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

Where do proteins manufactured in the Rough Endoplasmic Reticulum undergo processing and packaging?

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

What is the main function of the Smooth Endoplasmic Reticulum?

<p>Lipids synthesis and storage of calcium (C)</p> Signup and view all the answers

Where are centrioles usually located in animal cells?

<p>Next to the nucleus (D)</p> Signup and view all the answers

What is the function of the pericentriolar material (PCM) in relation to centrioles?

<p>Surrounding the pair of centrioles (C)</p> Signup and view all the answers

In the context of centrioles, what does the term 'PCM' stand for?

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

What is the main structural difference between cilia and flagella?

<p>Flagella have 9 doublets of microtubules (D)</p> Signup and view all the answers

Where is the basal body located in relation to cilia?

<p>At the base of the cilium (C)</p> Signup and view all the answers

Which cellular component is responsible for providing energy for movement in flagella?

<p>Sheath of mitochondria (A)</p> Signup and view all the answers

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

<p>Formation of the mitotic spindle (D)</p> Signup and view all the answers

What is responsible for polymerizing and depolymerizing microtubules from the centrosome?

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

Which organelle is responsible for storing the genetic material in a cell?

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

What is the theory that suggests mitochondria were prokaryotes that began to live in symbiosis with eukaryotic cells known as?

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

Which component of the nucleus is responsible for forming nuclear pores that allow communication with the cytoplasm?

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

What is the liquid part of the material that fills the nucleus called?

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

Which of the following represents the way DNA appears when the cell is not in division, during interphase?

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

What is responsible for joining two chromatids at a point called the centromere to form a chromosome?

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

Which component of the cytoskeleton is responsible for maintaining the shape of the cell, cell movements, and intracellular transport?

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

Which protein forms actin filaments, which are responsible for muscle contraction and movement in non-muscular cells?

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

Which structure increases the surface area of a cell to have more contact with the environment?

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

Which structure consists of hollow cylinders and provides rigidity and maintains the shape of the cell?

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

What are sister chromatids formed by?

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

Which structure allows communication between the nucleus and the cytoplasm?

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

What is the main function of the cell membrane?

<p>Regulating interactions with other cells (D)</p> Signup and view all the answers

Which component is the most abundant in the cell membrane?

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

What is the role of glycolipids in the plasma membrane?

<p>Recognizing molecules and other cells (D)</p> Signup and view all the answers

Which statement about membrane proteins is true?

<p>They can establish cell junctions (B)</p> Signup and view all the answers

What is the role of ribosomes associated with membranes?

<p>Producing proteins for membranes or release outside the cell (A)</p> Signup and view all the answers

Which component is located in the spaces between unsaturated tails in the plasma membrane?

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

What is the main function of intrinsic membrane proteins?

<p>Transporting substances across the membrane (A)</p> Signup and view all the answers

What is the main role of glycolipids in the plasma membrane?

<p>Recognizing molecules and other cells. (A)</p> Signup and view all the answers

Which component is located in the spaces between unsaturated tails in the plasma membrane?

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

What is the main function of intrinsic membrane proteins?

<p>Transporting substances across the membrane (C)</p> Signup and view all the answers

Which organelle is responsible for protein synthesis?

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

What is the main function of glycolipids in the plasma membrane?

<p>Recognizing molecules and other cells. (B)</p> Signup and view all the answers

Which type of organisms are made up of several cells grouped together and specialized in certain functions within the organism itself?

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

What is the main difference between eukaryotic cells and prokaryotic cells?

<p>Presence of nucleus (D)</p> Signup and view all the answers

What are tissues in multicellular organisms composed of?

<p>Different types of cells with similar functions (A)</p> Signup and view all the answers

Where is the genetic material located in eukaryotic cells?

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

What surrounds all types of cells, providing a barrier between the internal and external environment?

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

What is the main function of the Golgi apparatus in a cell?

<p>Protein processing and packaging (D)</p> Signup and view all the answers

What is the main function of the mitochondria in a eukaryotic cell?

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

Which organelle is able to duplicate its DNA content and divide by fission?

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

What is the composition of chromatin when the cell is not in division (interphase)?

<p>Complex with histones (A)</p> Signup and view all the answers

What is the specific number of chromosomes found in human cells?

<p>46 chromosomes (C)</p> Signup and view all the answers

What structure forms when two chromatids join at a point called the centromere?

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

What component of the cytoskeleton is responsible for maintaining the shape of the cell and cell movements?

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

What protein is responsible for organizing actin into bundles or networks in non-muscular cells?

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

What are cellular membrane protrusions that increase the cell's surface area?

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

What do intermediate filaments support within the cell?

<p>'Three-dimensional structure' (C)</p> Signup and view all the answers

'Myosin II' is associated with which type of actin filaments?

<p>'Contractile bundles' (C)</p> Signup and view all the answers

What is the main function of centrioles in the cell?

<p>Intervene in cell division (C)</p> Signup and view all the answers

What are microtubules dynamic structures for?

<p>Regulating intracellular transport (C)</p> Signup and view all the answers

In animal cells, where is the centrosome located?

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

What is the main structure of cilia formed by?

<p>A central pair of microtubules surrounded by 9 doublets (C)</p> Signup and view all the answers

What is the main structure of the flagellum in the sperm cell?

<p>92 + 2 arrangement of microtubules (B)</p> Signup and view all the answers

What surrounds a pair of centrioles to form a centrosome?

<p>Pericentriolar material (PCM) (B)</p> Signup and view all the answers

What is responsible for forming the mitotic spindle necessary for cell division?

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

How does a daughter centriole form during cell division?

<p>It duplicates from another centriole (B)</p> Signup and view all the answers

Where is the basal body located in relation to cilia?

<p>At the base of the cilia (C)</p> Signup and view all the answers

What provides energy for movement in the flagellum of sperm cells?

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

What is the main function of cilia?

<p>To cover the surface of the cell and move substances from the medium (C)</p> Signup and view all the answers

What do a pair of centrioles form when surrounded by pericentriolar material (PCM)?

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

What is the main function of peroxisomes in a cell?

<p>Degradation of fatty acids (C)</p> Signup and view all the answers

Where do proteins synthesized in the Rough Endoplasmic Reticulum undergo processing and packaging?

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

What is the main function of the Smooth Endoplasmic Reticulum (SER) in a cell?

<p>Lipid synthesis and storage of calcium (B)</p> Signup and view all the answers

What is the main function of lysosomes in a cell?

<p>Degradation of molecules (A)</p> Signup and view all the answers

Where does oxidative phosphorylation occur to obtain ATP?

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

What is the function of the Rough Endoplasmic Reticulum (RER) in a cell?

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

What is the function of mitochondria in a cell?

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

What is the main function of the Golgi Apparatus?

<p>Transport control and direction (B)</p> Signup and view all the answers

Where are proteins manufactured and modified before entering the Golgi Apparatus for processing and packaging?

<p>Rough Endoplasmic Reticulum (RER) (C)</p> Signup and view all the answers

What is the main role of the cell membrane?

<p>Maintaining cell integrity and regulating interactions with other cells (A)</p> Signup and view all the answers

Which type of lipids are the most abundant in the cell membrane?

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

What is the function of glycolipids in the plasma membrane?

<p>Recognition of molecules and other cells (A)</p> Signup and view all the answers

What is the main role of intrinsic membrane proteins?

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

Where can ribosomes be found in a cell?

<p>Cytoplasm and associated with membranes (B)</p> Signup and view all the answers

What is the main function of ribosomes associated with membranes?

<p>Synthesizing proteins for membranes or release outside the cell (C)</p> Signup and view all the answers

Which structure allows communication between the nucleus and the cytoplasm?

<p>Nuclear pore complex (C)</p> Signup and view all the answers

What is the main function of the cytoskeleton component responsible for maintaining cell shape and movements?

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

What is responsible for forming the mitotic spindle necessary for cell division?

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

What differentiates eukaryotic cells from prokaryotic cells?

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

What surrounds all types of cells, providing a barrier between the internal and external environment?

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

What type of lipids limits the ability of movement but also prevents strong bonds between fatty acids being established, providing fluidity to the bilayer?

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

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