the cellular basis of life
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Questions and Answers

What is the primary function of the cell membrane?

  • To provide a medium for chemical reactions
  • To separate the cell's interior from its surrounding environment (correct)
  • To store genetic material
  • To synthesize proteins

What is the common feature among all cells?

  • Plasma membrane, cytoplasm, DNA, and ribosomes (correct)
  • Mitochondria and chloroplasts
  • Cell wall and plasma membrane
  • Lysosomes and centrioles

What is the approximate composition of ribosomes?

  • 60% RNA and 40% protein (correct)
  • 80% RNA and 20% protein
  • 90% RNA and 10% protein
  • 50% RNA and 50% protein

What is the purpose of the universal genetic code?

<p>To define the correspondence between amino acids and codons in mRNA (A)</p> Signup and view all the answers

What is the function of cytoplasm?

<p>To provide a medium for chemical reactions (D)</p> Signup and view all the answers

What is the term for the most recent common ancestor of all life on Earth?

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

What is the primary function of ribosomes in living systems?

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

What is the main component of ribosomes?

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

What is the function of the nucleolus in eukaryotic cells?

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

What is the primary function of the rough endoplasmic reticulum?

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

What is the process by which cells take in external molecules through vesicle formation?

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

What is the primary function of lysosomes in animal cells?

<p>Breaking down excess or worn-out cell parts (C)</p> Signup and view all the answers

What is the primary function of vacuoles in plant cells?

<p>Storage of waste or pigments (B)</p> Signup and view all the answers

What is the primary function of mitochondria in cells?

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

What is the process by which cells release molecules outside the cell through vesicle fusion?

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

What is the type of endocytosis that involves the engulfment of large particles or cells?

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

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