_______________ are the two parts of a chromosome.

Question

BlackTom AI · Accepted Answer

The question asks: '_______________ are the two parts of a chromosome.' Let's evaluate each option in turn.
Option 1: sister chromatids. This is correct because, during cell division, a replicated chromosome consists of two identical sister chromatids held together at the centromere; together they constitute the two parts of a chromosome prior to separation.
Option 2: Chlorophyll. Chlorophyll is the green pigment in plants involved in photosynthesis, not a structural part of a chromosome. Its presence has no relation to chromosome architecture, so this choice is incorrect.
Option 3: chromatin. Chromatin refers to the complex of DNA and protein that makes up chromosomes in their non-condensed, functional form within the nucleus. While chromatin is related to chromosomes, it is not the term for the two parts of a replicated chromosome; rather, chromatin is the material that condenses to form chromosomes. This makes the statement misleading, so this option is not accurate in this specific context.
Option 4: DNA. DNA is the genetic material carried within chromosomes, but a chromosome is not composed of two DNA molecules; rather, a replicated chromosome contains two sister chromatids, each containing an individual DNA molecule. Therefore, this option does not correctly identify the two parts of a chromosome.
Overall, the only choice that correctly identifies the two parts of a chromosome is option 1, sister chromatids, because it reflects the standard description of replicated chromosomes during cell division.

BIOL-10-20048-S25 Lecture Exam 2- Wednesday 3/24

_______________ are the two parts of a chromosome.

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