Before a cell divides, each chromosome is replicated. The two identical copies remain attached and are called
Correct answer: B. sister chromatids
- A. homologues
- B. sister chromatids
- C. bivalents
- D. telomeres
Explanation
DNA replication produces two identical sister chromatids joined at the centromere, which separate at anaphase into different daughter cells. Homologues are the maternal and paternal members of a pair, not copies of one chromosome.
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Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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