Modify the following statement to make it correct: Ribozymes are ribonucleosomes used by bacteria and eukaryotic cells to modify DNA.
A. Ribozymes are ribonucleases used by bacteria and eukaryotic cells to modify DNA.
B. Ribozymes are ribonucleosomes used by bacteria and eukaryotic cells to modify RNA.
C. Ribozymes are ribonucleases used by bacteria and eukaryotic cells to modify RNA.
D. Ribozymes are ribonucleosomes used only by eukaryotic cells to modify RNA.
Answer: C
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According to Fig 9.10, which of the following is NOT responsible for amplifying the signal in a cell responding to adrenaline signaling?
A. the binding of the receptor by adrenaline B. the production of cAMP by adenylyl cyclase C. the activation of protein kinase A by cAMP D. the phosphorylation of proteins by protein kinase A E. All of these choices amplify the adrenaline signal.
State a significant difference between X-linked and sex-influenced inheritance
What will be an ideal response?
Mitosis is the process by which
A.) microtubules are assembled B.) cytoplasm is divided C.) the nucleus is divided into two nuclei D.) the cell rests
Males of the fly species Drosophila bifurca are only a few millimeters in length, yet they hold the world record for sperm length, with sperm being 50mm long
Males produce only ca. 100 sperm over the course of their lives, as such large sperm are very costly to produce. One hypothesis to explain such large sperm size is postcop-ulatory sperm competition. Which of the following are reasonable approaches to test this hypothesis? a. test whether the order in which multiple males mated with the same female correlates to the number of offspring sired by each male b. examine the physical location of male sperm in the female reproductive or-gans via microscopy c. document fertilization success in crosses between a single male and a single female d. test whether the degree of sperm competition in related Drosophila species correlates with sperm size e. A, B, and D