In prokaryotic cells, DNA replication occurs in the Select one: a. Cytoplasm b.
ID: 99645 • Letter: I
Question
In prokaryotic cells, DNA replication occurs in the Select one: a. Cytoplasm b. Cell membrane c. Ribosome d. Nucleus e. Stroma Proteins in the cell serve as checkpoints during the cell cycle to ensure that the cell has successfully completed a particular phase of the cell cycle. What can result if the checkpoint proteins are defective in the cell cycle? Select one: a. Cell death b. Cancer c. New cells with too many chromosomes d. Cell free for all e. A and C The specific region on a chromosomes where chromatics are attached to each other is called Select one: a. allele b. centromere c. homologue d. locus e. telomere What are telomeres? Select one: a. A specific location of a gene on a chromosome b. An attachment site for microtubules that move chromosomes during cell division c. A protective cap on the end of chromosomes that keep genes intact during DNA replication d. A sex chromosome e. A very condensed piece of DNA What is the result of mitosis? Select one: a. Four genetically identical cells b. Two genetically identical cells c. Four genetically different cells d. Two genetically different cells e. One cell with twice as much DNA as the original cellExplanation / Answer
6) Prokaryotes does not have nucleus. So, therefore DNA replication occurs in cytoplasm (option a).
7) Cell cycle checkpoint proteins ensures that the cell has successfully completed a phase of cell cycle. It it is defective, defective genes are produced in large numbers and causes cancer (option b).
8) Chromatids are attached to each other at centromere (option b).
9) Telomeres are protective cap at the end of chromosomes that keep genes intact during replication (option c). They require the presence of enzyme telomerase.
10) Mitosis takes place in somatic cells and results in the formation of two identical cells. (option b). Here the chromosome number is not altered.