The stages of meiosis I are virtually the same as the stages of mitosis. The one major difference is ____
a. the homologous chromosomes line up opposite each other during metaphase
b. there is no anaphase in meiosis I
c. there is no prophase in meiosis I
d. the homologous chromosomes line up next to each other during metaphase
e. the homologous chromosomes line up at opposite ends of the spindle equator
ANSWER: a
You might also like to view...
Discuss how photosynthesis is a natural partner for aerobic respiration
What will be an ideal response?
Rubisco is an important enzyme in the Calvin cycle because it acts as a carboxylase to catalyze addition of carbon dioxide and water to ribulose-1,5-bisphosphate, which then forms two molecules of 3-phosphoglycerate
Rubisco also acts as an oxygenase to catalyze addition of molecular oxygen rather than carbon dioxide to ribulose-1,5-bisphosphate. a) What is (are) the product(s) of the rubisco oxygenase reaction activity and why is this a problem for plants? b) Explain why rubisco's much lower affinity for oxygen than for carbon dioxide does not mitigate the rubisco oxygenase problem for plants. c) Identify the pathway plants use to metabolize the problematic product of rubisco oxygenase and the final fate of its carbons. d) Explain why the oxygenase activity of rubisco is particularly problematic for plants in arid environments. e) What strategies do plants in arid environments use to deal with this problem? What will be an ideal response?
For amino acids with neutral R groups, at any pH below the pI of the amino acid, the population of amino acids in solution will have:
A) a net negative charge. B) a net positive charge. C) no charged groups. D) no net charge. E) positive and negative charges in equal concentration
You are given the chemical code of one-half of a DNA double helix: CATGATTACCTAGAATCCTGTAAT. Which of the following sequences represents the codons and anticodons that would be used in creating a protein if the other half of the DNA strand is the coding strand?
A. mRNA codons: CATGATTACCTAGAATCCTGTAAT tRNA anticodons: CATGATTACCTAGAATCCTGTAAT B. mRNA codons: CAUGAUUACCUAGAAUCCUGUAAU tRNA anticodons: GUACUAAUGGAUCUUAGGACAUUA C. mRNA codons: CATGATTACCTAGAATCCTGTAAT tRNA anticodons: CAUGAUUACCUAGAAUCCUGUAAU D. mRNA codons: GUACUAAUGGAUCUUAGGACAUUA tRNA anticodons: CAUGAUUACCUAGAAUCCUGUAAU