CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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At the end of chromosomes; protect the chromosome
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At the end of genes; protect the genes
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Periodically throughout the chromosome; are checkpoints for replication
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At the beginning and ends of genes; support protein synthesis
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Detailed explanation-1: -Telomeres are structures made from DNA sequences and proteins found at the ends of chromosomes. They cap and protect the end of a chromosome like the end of a shoelace. In almost all animals, from the simplest to the most complex, telomeres are required for cell division.
Detailed explanation-2: -Telomeres, the specific DNA–protein structures found at both ends of each chromosome, protect genome from nucleolytic degradation, unnecessary recombination, repair, and interchromosomal fusion. Telomeres therefore play a vital role in preserving the information in our genome.
Detailed explanation-3: -Telomeres are distinctive structures found at the ends of our chromosomes. They consist of the same short DNA sequence repeated over and over again.
Detailed explanation-4: -Telomeres are the basis for the Hayflick limit, the number of times a cell is able to divide before reaching senescence [3]. Telomeres are located at the end of chromosomes, where they help protect against loss of DNA during replication.
Detailed explanation-5: -Shelterin is known to regulate the action of telomerase, and to prevent inappropriate DNA damage responses at chromosome ends, mostly through inhibition of ATM and ATR.