Which statement correctly describes the similarity of centromeres in different organisms?
A) Both yeast and plant centromeres have two 10-to-15 bp conserved elements.
B) Yeast centromeres have fewer satellite DNA repeats than do human centromeres.
C) Both human and plant centromeres are composed of repeated satellite DNA sequences.
D) Yeast centromeres have fewer satellite DNA repeats than do plant centromeres.
C) Both human and plant centromeres are composed of repeated satellite DNA sequences.
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It has been thought that many diseases now associated with aging are related to malfunctioning
mitochondria. Why are the mitochondria so important to all cells?
a. They produce energy in the form of ATP. b. They generate heat to keep the body warm. c. They are the source of all human disease. d. They are extremely large. e. They are located only in vital organs.
Which phylum features segmented bodies and jointed appendages?
a. Arthropoda b. Nematoda c. Platyhelminthes d. Annelida
Items a through c below are processes that occur during different
stages of photosynthesis. Answer questions 58–61 by selecting one of these three processes. a. oxidation b. reduction c. phosphorylation E 58. This process leads to the formation of ATP from ADP plus inorganic phosphate. M 59. This process occurs when an electron is passed to an electron acceptor molecule, such as NADP+. D 60. This process is involved when a photon of light energy causes an electron to leave the chlorophyll molecule. M 61. This process occurs when an electron transport molecule gives up an electron.
Cystic fibrosis is the result of:
A) an abnormal sodium channel protein. B) no sodium channel protein. C) cysts in the lungs. D) no sodium-potassium pump. E) an abnormal chloride channel protein.