Cell Biology 1st Year: Cell Definition and Functions

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Questions and Answers

Which kingdom consists of organisms that obtain nutrients through absorption?

  • Kingdom Monera
  • Kingdom Protista
  • Kingdom Fungi (correct)
  • Kingdom Plantae

What is the basis for the classifications of the mentioned kingdoms?

  • Movement and cell type
  • Nutrition and cell organization (correct)
  • Cell organization and respiration
  • Respiration and reproduction

Which kingdom is composed of unicellular prokaryotic organisms?

  • Kingdom Monera (correct)
  • Kingdom Fungi
  • Kingdom Plantae
  • Kingdom Protista

What is the study of cells and the organelles they contain called?

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

Who first formulated the cell theory in biology?

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

What is the fundamental building block shared among all living organisms?

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

Who observed the cell walls of cork and coined the term 'cell' to describe their appearance?

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

Which classification system categorizes living organisms into five main groups including Kingdom Monera and Kingdom Plantae?

<p>Five-kingdom classification (A)</p> Signup and view all the answers

Who constructed his own microscopes and utilized them to document various microscopic structures including spermatozoa, numerous protists, and blood cells?

<p>Antonie van Leeuwenhoek (A)</p> Signup and view all the answers

What is the smallest structurally and functionally viable entity that possesses distinctive characteristics such as assimilation and self-reproduction?

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

Which component of the glycocalyx is primarily responsible for cell recognition and interaction?

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

What percentage of the plasma membrane's chemical composition consists of lipids?

<p>43% (D)</p> Signup and view all the answers

In the fluid mosaic model of membrane structure, what remains the core of the membrane?

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

Which type of lipid helps regulate the fluidity and stability of the membrane?

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

Where are glycolipids found in the plasma membrane?

<p>On the extracellular side (D)</p> Signup and view all the answers

Which of the following is NOT a function of the plasma membrane?

<p>Synthesizing ATP for the cell (D)</p> Signup and view all the answers

What is the primary component of the plasma membrane?

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

What is the extracellular material that mediates cell–cell and cell–substratum interactions, and provides mechanical protection to cells?

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

What term describes the asymmetrical nature of the plasma membrane due to the existence of glycocalyx on its outer surface?

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

What is the typical thickness range of the plasma membrane?

<p>8 to 12 nanometers (nm) (D)</p> Signup and view all the answers

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