Both glycoproteins and proteoglycans contribute to the carbohydrate layer on the surface of the cell. Which of the following is not true of glycoproteins?
(a) They can be secreted into the extracellular environment.
(b) They have only one transmembrane domain.
(c) They have long carbohydrate chains.
(d) They are recognized by lectins.
(c)
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Sponges, which are found in aquatic environments, have special flagellated cells that help to
draw food into their body cavities. Sponges are most likely __________.
a. filter feeders b. fluid feeders c. bulk feeders d. predators
Each molecule of hemoglobin can bind up to six molecules of oxygen
Indicate whether the statement is true or false.
HIV, which causes AIDS, can be cured by using broad-spectrum antibiotic therapy
Indicate whether the statement is true or false
What circumstances are generally not associated with histone phosphorylation?
a. in association with chromatin remodeling during transcription b. during DNA repair c. during homologous recombination d. cyclically during the cell cycle e. Histone phosphorylation is associated with all of the above circumstances.