Uzma Chapter 2 mcq created with chatgpt4
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary role of proteins within the cell?

  • Energy storage
  • Acting as enzymes to catalyze biological reactions (correct)
  • Serving as genetic material
  • Forming ionic bonds with inorganic compounds

How do phospholipids contribute to cellular structure?

  • By acting as primary genetic material
  • By catalyzing cellular reactions
  • By forming the lipid bilayer of cell membranes (correct)
  • By providing energy storage

Which of the following molecules is most abundant in cells?

  • DNA
  • Proteins
  • Water (correct)
  • Lipids

What type of bond is formed when atoms share a pair of electrons?

<p>Van der Waals interaction (D)</p> Signup and view all the answers

Which molecule serves as the principal form of chemical energy within cells?

<p>ATP (Adenosine Triphosphate (B)</p> Signup and view all the answers

Which process describes the synthesis of RNA from a DNA template?

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

What is the significance of the Golgi apparatus in cellular function?

<p>Modification and sorting of proteins (C)</p> Signup and view all the answers

Which type of RNA plays a role in bringing amino acids to the ribosome during protein synthesis?

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

What cellular structure is primarily responsible for the production of ATP?

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

How do enzymes affect the reactions they catalyze?

<p>Lower the activation energy of the reaction (D)</p> Signup and view all the answers

Which organelle is primarily involved in the detoxification of harmful substances in liver cells?

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

In cell signaling, what molecule acts as a second messenger to relay signals from cell surface receptors to target molecules inside the cell?

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

What is the main function of ribosomal RNA (rRNA) in the process of protein synthesis?

<p>Forming the core of the ribosome's structure and catalyzing protein synthesis (C)</p> Signup and view all the answers

Which cellular process involves the packaging of cellular products into vesicles for export out of the cell?

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

The cytoskeleton is essential for a cell because it:

<p>Provides structural support and facilitates movement (C)</p> Signup and view all the answers

What mechanism do cells use to maintain homeostasis in response to changes in their environment?

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

Which structure is responsible for modifying, sorting, and shipping off cellular products and is often termed the 'post office' of the cell?

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

Autophagy within cells is best described as:

<p>The destruction of cellular components within lysosomes (C)</p> Signup and view all the answers

Cellular receptors are crucial for which of the following processes?

<p>Responding to external signals (B)</p> Signup and view all the answers

Which process is directly involved in the conversion of genetic information into a functional product?

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

What is the primary function of mitochondria in eukaryotic cells?

<p>Energy production through ATP synthesis (C)</p> Signup and view all the answers

Which cellular component is responsible for breaking down excess or worn-out cell parts?

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

Cell surface receptors are critical for which type of cellular communication?

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

What process involves the transfer of information from a gene to an mRNA molecule?

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

Which type of cell junctions allow for the direct electrical and metabolic coupling of adjacent cells?

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

Which organelle is responsible for the synthesis of lipids and detoxification of toxins?

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

During which phase of cell division do chromosomes become visible and the nuclear envelope dissolves?

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

Which type of RNA is involved in the regulation of gene expression by interfering with mRNA?

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

What is a common consequence of mutations in the DNA sequence of a gene?

<p>Alteration in the amino acid sequence of the encoded protein (C)</p> Signup and view all the answers

What role do lysosomes play in the cell?

<p>Degradation of intracellular debris through enzymatic digestion (C)</p> Signup and view all the answers

More Like This

Cytoskeleton and Cell Structure Quiz
10 questions
Cell Structure and Function Quiz
8 questions
Cell Structure and Function Quiz
32 questions
Use Quizgecko on...
Browser
Browser