The correct answer is B. Prokaryotes do not have a nucleus, while eukaryotes do.
Specialized <span>proteins </span><span>attach to the </span>DNA<span> strand and make a copy of the DNA sequence in the form of a molecule called messenger </span>RNA<span> (mRNA). </span><span>The genetic message is transferred outside the nucleus via mRNA. Hope this answers the question. Have a nice day.</span>
Answer:
C. Kinesin-5 (kinesin A) works to lengthen the spindle whereas kinesin-14 (kinesin B) works to shorten it.
Explanation:
Kinesins are microtubule-based motors localized in the mitotic spindle in order to ensure the correct segregation of the chromosomes during cellular division. These proteins are classified regarding their sequences at the core motor domains which determine their motility. Kinesins can move along microtubules in opposite directions, walking toward the plus end (i.e., the end that grows more rapidly) or moving toward the minus end. Recently, it has been shown that opposite forces between kinesin-5 (plus-end-directed) and kinesin-14 (minus-end-directed) microtubule-based motors regulate the length of the spindle during cellular division. Kinesin-14 is a minus-end-directed motor protein that walks along microtubules from plus- to minus-end, while kinesin-5 is a plus-end-directed motor protein that walks along microtubules from minus- to plus-end, and thereby they work to shorten and lengthen the mitotic spindle, respectively.
Answer: The statement is false or incorrect.
Explanation:
The concentration of atmospheric carbon dioxide is currently increasing due to human activities.
The main materials that are responsible for increasing carbondioxode concentration in the environment is burning of fossil fuels such as petrol, diesel and CNG etc. When these fuels burns in engine of vehicles and industries, the carbondioxode gas is emitted and goes to the atmosphere which causes global warming.
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