40. Muscle cels differ from nerve cells mainly because they A) express different

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40. Muscle cels differ from nerve cells mainly because they A) express different genes. B) contain different genes C) use dfferent genetic codes D) have unique ribosomes E) have different chromosomes 41. How does a bacterial cell protect its own DNA from restriction enzymes? A) by adding methyl groups to adenines and cytosines B) by using DNA ligase to seal the bacterial DNA into a closed circle C) by adding histones to protect the double-stranded DNA D) by forming "sticky ends" of bacterial DNA to prevent the enzyme from attaching E) by reinforcing the bacterial DNA structure with covalent phosphodiester bonds 42 Which of the following is used to make complementary DNA (cDNA) from RNA? A) restriction enzymes B) gene cloning C) gel electrophoresis D) reverse transcriptase 43. The genetic code is essentially the same for all organisms. From this, one can logically assume which of the following? A) A gene from an organism can theoretically be expressed by any other organism. B) All organisms have experienced convergent evolution. C) DNA was the first genetic material. D) The same codons in different organisms translate into different amino acids E) Different organisms have different numbers of different types of amino acids 44. Which of the following statements best describes theories? A) They are nearly the same things as hypotheses B) They are supported by, and make sense of, many observations C) They cannot be tested because the described events occurred only once. D) They are predictions of future events 45. Charles Darwin was the first person to propose A) that evolution occurs 8) a mechanism for how evolution occurs. E that population growth can outpace the growth of food resources. D) a mechanism for evolution that was supported by evidence. that Earth is older than a few thousand years. 46. During an indlividual organism's lifetime, which of these is most likely to help the organism respond properly to changes n its environment? A) microevolution B) changes in gene expression C) change in allele or gene frequency D) change in average heterozygosity 4. i ound that a cortain population in Hardty Woiberg eumfor a particular gene, this means A) The population is changing over generations at that gene. B) Allele frequencies are changing for that population. C) Individuals are changing their alleles via directed mutation. D) The population is not changing at this locus, the allele frequencies remain the same over E) The alleles are all equal in frequency in this generation. ollowing has a better chance of influencing gene frequencies in small populations than in large one most consistently requires a small population as a precondition for its occurrence? A) mutation B) nonrandom mating C) genetic drift 49. Genetic variation in bacterial populations cannot result from 50. In general, what is the primary ecological role of prokaryotes? D) natural selection E) gene flow A) transduction. B) transformation C) conjugation D) mutation. E) meiosis. A) parasitizing eukaryotes, thus causing diseases B) breaking down organic matter C) metabolizing materials in extreme environments D) adding methane to the atmosphere E) serving as primary producers in terrestrial environments Have a lovely Summer Break!!

Explanation / Answer

40. A) express different genes

Muscle cells are different from the nerve cells as nerve cells will be involved in neural synapse transmission whereas, muscle cells would be producing movement by contraction, along with sending messages to the muscle cells from the receptor cells. Nerve cells do not contract like the muscle cells. Also, the neural cell has the receiver area referred to as the somatic cells, whereas, such a thing is not present in muscle cells.

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