Plant and animal cells Knowledge-Based Download PDF

Questions

1. 1.

   During cytokinesis, dividing plant cells construct a cell plate to separate daughter nuclei, whereas animal cells accomplish cytoplasmic division through which of the following mechanisms?

   • A) Formation of a cleavage furrow via an actin-myosin contractile ring
   • B) Deposition of a pectin-rich cell plate along the equatorial plane
   • C) Complete dissolution of the plasma membrane followed by reassembly
   • D) Inward growth of a rigid peptidoglycan layer from the cell boundary
2. 2.

   Which of the following cellular structures is bounded by a specialized membrane known as the tonoplast and plays a primary role in maintaining turgor pressure within mature plant cells?

   • A) Golgi apparatus
   • B) Lysosome
   • C) Peroxisome
   • D) Central vacuole
3. 3.

   Which of the following structures consists of narrow cytoplasmic channels crossing the cell wall to allow transport and communication directly between adjacent plant cells?

   • A) Tight junctions
   • B) Desmosomes
   • C) Gap junctions
   • D) Plasmodesmata
4. 4.

   Which of the following structures is typically present in animal cells to help organize spindle fibers during cell division, but is absent in the cells of most higher plants?

   • A) Golgi apparatus
   • B) Mitochondrion
   • C) Endoplasmic reticulum
   • D) Centriole
5. 5.

   Which of the following cellular structures is present in typical photosynthetic plant cells but absent in animal cells?

   • A) Cell wall made of cellulose and chloroplasts
   • B) Mitochondria and a phospholipid cell membrane
   • C) Endoplasmic reticulum and Golgi apparatus
   • D) Cytosolic ribosomes and a membrane-bound nucleus