Cell Biology Quiz: Microtubules, Cell Division, Organelles
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Questions and Answers

What is the formula for microtubule centrioles?

  • /9Ñ…3/0* (correct)
  • /9Ñ…2/2
  • /9Ñ…3/3
  • /9Ñ…2/0

During which process of cell division occurs a four-fold decrease in the number of chromosomes?

  • meiosis* (correct)
  • endomitosis
  • amitosis
  • mitosis

Which organelle is involved in the intracellular digestion of substances?

  • mitochondria
  • the peroxisome
  • Golgi complex
  • lysosomes* (correct)

What is a marker enzyme for peroxisomes?

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

The transfer of macromolecules through plasmolemma as a solution, colloid, or suspension is carried out by:

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

What protein are microtubules composed of?

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

During which stage does the implantation of the embryo in the uterine wall occur?

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

How many days after fertilization does the human embryo begin to implant into the uterus?

<p>7 days (B)</p> Signup and view all the answers

From which of the following does the endoderm form?

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

Which of the following is derived from the embryonic ectoderm?

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

What type of human placenta exists?

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

Where do primordial germ cells form?

<p>Endoderm of the yolk sac (B)</p> Signup and view all the answers

What is the allantois?

<p>Digitule endoderm growing into the amniotic stem (B)</p> Signup and view all the answers

When does the acrosomal reaction occur?

<p>Selection of sperm hyaluronidase and trypsin (B)</p> Signup and view all the answers

What is derived from mesenchyme splanchnotome?

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

What is cortical reaction?

<p>Formation of fertilization membrane (A)</p> Signup and view all the answers

During which stage does the implantation of the embryo in the uterine wall occur?

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

What is the source of chorionic?

<p>Trophoblast and extraembryonic endoderm (C)</p> Signup and view all the answers

When does the acrosomal reaction occur?

<p>The penetration of sperm into the egg (C)</p> Signup and view all the answers

What is derived from mesenchyme splanchnotome?

<p>Striated muscle tissue (D)</p> Signup and view all the answers

From which of the following does the endoderm form?

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

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