Which of the following are obligate intracellular pathogens a) Antibiotics b) Viruses c) Probiotics d) Thermophilic bacteria
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31. Which of the following are obligate intracellular pathogens a) Antibiotics b) Viruses c) Probiotics d) Thermophilic bacteria
29. When an electrical impulse arrives at a chemical synapse, neurotransmitters are released. These act by a) opening ion channels in the postsynaptic membrane. b) opening ion channels in the presynaptic membrane. c) increasing the ion concentration in the synaptic cleft. d) physically connecting pre- and postsynaptic membranes.
2. Which of the following is a diploblastic phylum of aquatic predators? a) Mollusca b) Annelida c) Cnidaria d) Arthropoda
13. Genetic recombination resulting from sexual reproduction is beneficial as it allows for a) passing on deleterious mutations to the offspring, b) adaptation and change in an unstable environment. c) long-term survival and persistence of certain genotypes in stable environments. d) rapid population growth.
6. DNA molecules consist of a) a sugar, a phosphate and a nitrogenous base b) a sugar, a nitrate and a phosphorous base c) a sugar, a carbonate and a nitrogenous base d) a sugar, sulphate and a phosphorous base
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