All of the following statements about the periplasmic space are true except ________.
A. a minimal periplasmic space may be observed between the plasma membrane and the peptidoglycan in some Gram-positive bacteria
B. it is located between the plasma membrane and outer membrane of Gram-negative bacteria
C. it is found only in Gram-positive bacteria
D. it contains hydrolytic enzymes and binding proteins involved in nutrient acquisition
Answer: C
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Which of the following epithelial tissues secretes mucous and is dense with cilia?
A. stratified B. pseudostratified columnar C. simple D. cuboidal E. squamous
Imagine you were the manager of a national park with cheetahs. The cheetahs feed primarily on gazelles, while the gazelles eat grass. It takes an acre of grassland to feed one gazelle, and it takes ten gazelles to feed one cheetah
You have a maximum of ten cheetahs when the system is functioning optimally. You would like to increase the cheetah population because people pay money to see the cheetahs. How much grassland do you need to double the cheetah population supported by this grassland? A) 500 acres B) 200 acres C) 100 acres D) 10 acres
Why does the activation of a protein kinase that acts on initiation factor eIF2 block protein synthesis?
a) Phosphorylated eIF2 denatures. b) Phosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation. c) Dephosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation. d) Phosphorylated eIF2 is hyperactivated, blocking further translation. e) Phosphorylated eIF2 cannot exchange its GTP for GDP, which is required for eIF2 to participate in another round of translation initiation.
The most common type of virus leading to rhinitis is ________.
A. retrovirus B. coronavirus C. herpes simplex virus D. adenovirus E. rhinovirus