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What is the next step in muscle contraction after the actin changes shape

Amoeba proteus is injected with a drug that inhibits the formation of microtubules. what effect does this have on the organism’s movement?

In 1994, telomerase activity was discovered in human cancer cell lines. although telomerase activity is rarely present in human somatic tissue, this discovery indicated that humans do contain the genes for telomerase proteins and telomerase rna. since inappropriate activation of telomerase may contribute to cancer, why do you think the genes coding for this enzyme have been maintained in the human genome throughout evolution?