Question

question 7 (0.5 points)
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an area of the plant cell where cellulose - filled vesicles aggregate to form a new wall.
a) centrosome
b) synaptonemal complex
c) cell plate
d) cleavage furrow
question 8 (0.5 points)
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a disc shaped protein structure at the centromere of duplicated chromosomes where spindle fibers are attached.
a) cleavage furrow
b) centrosome
c) kinetochore
d) centriole

Explanation:

• Question 7:
• A centrosome is an organelle involved in organizing microtubules in animal cells, not related to plant cell wall formation.
• The synaptonemal complex is involved in meiosis (pairing of homologous chromosomes), not plant cell wall formation.
• The cell plate is formed during plant cell cytokinesis. Cellulose - filled vesicles aggregate at the equatorial plane of the plant cell to form the cell plate, which develops into the new cell wall.
• A cleavage furrow is seen in animal cell cytokinesis (pinching of the cell membrane), not in plant cell wall formation.
• Question 8:
• A cleavage furrow is related to animal cell cytokinesis (membrane - pinching), not to chromosome - spindle fiber attachment.
• A centrosome is an organelle that organizes microtubules (including spindle fibers), but it is not the disc - shaped protein structure at the centromere.
• A kinetochore is a disc - shaped protein structure at the centromere of duplicated chromosomes. Spindle fibers attach to the kinetochore, which helps in chromosome movement during cell division.
• A centriole is a part of the centrosome (in animal cells), involved in microtubule organization, not the specific structure at the centromere for spindle - fiber attachment.

Answer:

Question 7: C. cell plate
Question 8: C. kinetochore