In bacterial synthesis of polysaccharides, such as starch and glycogen, glucose is donated to the end of the growing chain by ADP-glucose. A similar reaction occurs in bacterial branching of phospholipids when phosphatidic acid is attached to a ________.
A. cytidine diphosphate carrier
B. dihydroxyacetone phosphate
C. fatty acyl-ATP
D. acetyl-CoA
Answer: A
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The pathway leading to the perception of sound by mammals begins with the _____
A) hair cells of the organ of Corti, which rests on the basilar membrane, coming in contact with the tectorial membrane B) hair cells of the organ of Corti, which rests on the tympanic membrane, coming in contact with the tectorial membrane C) hair cells of the organ of Corti, which rests on the tectorial membrane, coming in contact with the basilar membrane D) hair cells of the organ of Corti coming in contact with the tectorial membrane as a result of fluid waves in the cochlea causing vibrations in the round window E) hair cells on the tympanic membrane that stimulate the tectorial membrane neurons, leading to the auditory section of the brain
For a tissue or an organ to function as a unit, _____
A) there must be a signal molecule recognized by all cells in the tissue or organ B) there must be cell-cell communication among the cells within a tissue or organ C) the tissue or organ must perform similar functions D) the tissue or organ must be composed of all of the same type of cells
Based on the literature, you hypothesize that students in traditional biology lectures will have the same grades as students in online biology lectures. You decide to test your hypothesis by comparing grades of students in traditional and online biology lectures over a semester. As a result of the experiment, you observe that the grades in the traditional lectures and the grades in the online
lectures are not significantly different. What do these observations allow you to do? A. develop a scientific theory B. reject the hypothesis C. accept the hypothesis without further question D. reject the null hypotheses
Which of the following metabolize waste in both plant and animal cells?
a. Lysosomes b. Plasmodesmata c. Golgi apparatus d. Peroxisomes