Which one of the following is NOT one of the general classes of macromolecules that are necessary for cellular function?
A. Nucleic acids
B. Proteins
C. Ions
D. Carbohydrates
E. Lipids
C
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Which of the following statements about the behavioral effects governed by forS and forR in Drosophila is not correct?
A. The for gene encodes a cGMP-dependent protein kinase. B. This enzyme phosphorylates target proteins in the brain and affects neuronal activity. C. In the absence of food, both sitters and rovers move about in search of food. D. In the presence of food, sitters remain stationary and eat, whereas the rovers move all around the food and eat. E. The sitters usually become obese due to their stationary foraging behavior.
Which of the following proteins is observed exclusively in association with prokaryotic DNA replication?
A) DNA polymerase I B) primase C) helicase D) single-strand binding proteins E) telomerase
Seagrasses are important in all the following except:
a. nutrient recycling. b. providing a habitat for animals. c. stabilizing sediments. d. being consumed by most estuarine herbivores.
The type of epithelial cell found in the lining of some
airways and parts of the gut? a. simple cuboidal. b. simple squamous. c. simple columnar. d. stratified. e. stratified columnar.