bio 12
A human bone marrow cell, in prophase of mitosis, contains 46 chromosomes. How many chromatids does it contain? See Concept 12.1 (Page 236)
92
Which of the following is found in binary fission but not in mitosis?
Duplicated chromosomes attach to the plasma membrane.
Cells will usually divide if they receive the proper signal at a checkpoint in which phase of the cell cycle? See Concept 12.3 (Page 244)
G1
Which of the following correctly matches a phase of the cell cycle with its description?
G1: follows cell division
Which of the following is true of kinetochores?
They are sites at which microtubules attach to chromosomes.
Why is it difficult to observe individual chromosomes with a light microscope during interphase?
They have uncoiled to form long, thin strands.
Why do some species employ both mitosis and meiosis, whereas other species use only mitosis? See Concept 13.2 (Page 258)
They need both if they are producing plant gametes.
Which of the following is true of benign tumors, but not malignant tumors?
They remain confined to their original site
Cytochalasin B is a chemical that disrupts microfilament formation. How would this interfere with cell division?
cleavage
In some organisms, such as certain fungi and algae, cells undergo the cell cycle repeatedly without subsequently undergoing cytokinesis. What would result from this?
large cells containing many nuclei
