Which of the following cellular processes occur during metaphase II? 1) Microtubules search for and attach to kinetochores at the centromere of each chromosome. 2) Microtubules from both sides of the spindle tether each chromosome and move them to the center of the cell.
Use a diagram and some explanation to describe in full the indirect effect of glutamine on the activity of glutamine synthetase
The animal Mischievous gremlins come in three coat-color varieties: black, red, and striped (which consists of a mixture of black and red patches). The famous scientist Johnny Nerdelbaum Frink decided to investigate the hereditary basis of the Mischievous color variation. He carried out the following three crosses: Cross Offspring Striped Striped Striped Black Striped Red 16 striped, 5 black, 3 red 6 striped, 7 black 18 red, 9 striped, 6 black a. After analyzing these results, Professor Frink proposed a hypothesis to explain the inheritance of color in this animal. He assumes the presence of two loci which are under some type of epistasis. Explain this hypothesis. b. For the first two crosses, he tested this hypothesis by using a chi-square test. What would his tests look like? Striped Offspring Black Observed Numbers (0) Expected Numbers (E) O-E (O – E)² (O – E)²/E df P value = Therefore, the null hypothesis is: rejected not rejected x² = || TOTAL 13 13 (Choose one) Striped Offspring Black Red Observed Numbers (0) Expected Numbers (E) O-E (O – E)² (O – E)²/E df = P value = Therefore, the null hypothesis is: rejected not rejected TOTAL 24 24 = (Choose one)
This is true of matrix metalloproteinases
O Must be inhibited for a cell to become invasive.
O Degrade intracellular cytoskeletal proteins
O Are downregulated in most cancers.
Compare the characteristics of mammals and birds, noting the similarities and differences between the groups. Why don’t we consider mammals and birds closely related with a common ancestor, since they are both “warm-blooded”?
Study the figure and explain the mechanism behind the development of cancer Normal cell P53 Body of the gene 979 Promoter & CpG Island Cancer cell E1 5 Points DNA repeats www.www.www. -Unmethylated CpG -Methylated CDG
Which part of the bat’s anatomy provides a supplemental respiratory surface for gas exchange? Why is an additional respiratory surface necessary?
Discuss how the adenylate energy charge regulates metabolism and why it is a useful parameter to monitor. Explain how it affects enzymes and pathways from glycolysis all the way through to oxidative phosphorylation when levels of any of the adenylates change (give specific examples). Also, discuss why plants are generally less affected by a change in the adenylate energy charge compared to animals?
Write the amino acid sequence of the polypeptide that is synthesized if the top of the DNA is a coding strand (N-terminal amino acids on the left and C-terminal amino acids on the right)| 3′-TGGTAATTTTACAGTCGGGTACGTAGTTCACTAGATCCA-5′ 5′-ACCATTAAAATGTCAGCCCATGCATCAAGTGATCTAGGT-3′
Describe the details underlying an apoptotic signal transduction pathway. Describe the signal transduction mechanism underlying mitosis.
