What cell type would have a high concentration of motor proteins?
A. liver cell
B. mammary cell
C. hormone-secreting cell
D. muscle cell
E. nerve cell
D. muscle cell
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Microbial species have a core genome and a pan genome. What is the difference between the two?
A) The core genome consists of all the nucleic acid polymerases and translation enzymes, while the pan genome consists of all the biosynthetic pathways. B) The core genome is the set of genes within the mitochondria, while the pan genome is the set of genes in the nucleus of a species. C) The core genome is a set of genes shared by all members of a species, while the pan genome includes the core genes as well as genes that are not shared by all members. D) The core genome is the set of genes introduced by horizontal gene transfer, while the pan genome is the set of genes that is not transferred horizontally.
Which of the following statements is true regarding respiration in fish? Select all correct choices
A. Gas exchange occurs at the alveoli. B. Gas exchange occurs at the lamellae. C. Oxygen enters the bloodstream via countercurrent exchange. D. Oxygen enters the bloodstream via crosscurrent exchange. E. Oxygen moves through spiracles. F. Oxygen moves through bronchioles.
Which of the following statements accurately describes why Taq polymerase is used in PCR?
A. It has regions that are complementary to the primers. B. It is heat stable and can withstand the heating step of PCR. C. It binds more readily than other polymerases to the primers. D. Only minute amounts are needed for each cycle of PCR.
Describe the carbon cycle from the atmosphere to the primary producers and back again.
What will be an ideal response?