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QUESTION 6 Which of the following prevents polyspermy in humans? O A inactivating proteins in the...
Which of the following is true of the slow block to polyspermy? 1. It is directly...
Which of the following is true of the slow block to polyspermy? 1. It is directly produced by the depolarization of the membrane. 2. It involves the release of cortical granule contents (exocytosis). 3. It is a slow forming, transient mechanism to prevent polyspermy. 4. It involves the propagation of a Ca2+ wave. 5. It is initiated when the sperm binds to the zona pellucida. A. 1, 3 B. 2, 3 C. 2, 4 D. 2, 5 E. 2, 3,...
nces Mailings Review View Help AaBboct AaB AaBbo . Lolormal 」1NoSpac Heading 1 Heading 2 Title...
nces Mailings Review View Help AaBboct AaB AaBbo . Lolormal 」1NoSpac Heading 1 Heading 2 Title Subtit y.a-圈플 ..|2 Paragraph Styles and 21. The two mechanizms for blocking polyspermy are 22. The cortical granule reaction that occurs after sperma faces with egg cell membrane serves as a slow block to polyspemmy. Which of the following events occur during a cortical reaction? A: Cortical reaction first releases proteases to remove the bounded sperm the egg cell membrane yet B: Cortical reaction...
A sea urchin egg is treated with an inhibitor that prevents the rise in intracellular Ca2+...
A sea urchin egg is treated with an inhibitor that prevents the rise in intracellular Ca2+ right before fertilization. Which of the following events would be blocked by addition of this inhibitor? Choose one or more: A. formation of vesicles under the plasma membrane B. exocytosis of hydrolytic enzymes C. fertilization envelope rising from the cell surface D. entry of multiple sperm into the cell
> Question 19 Which treatment is likely to induce cortical granule reactions? a) UV-irradiating the egg...
> Question 19 Which treatment is likely to induce cortical granule reactions? a) UV-irradiating the egg nucleus b) Removal of the zona pellucida from an egg c) Increasing the cytosolic concentration of Ca++ in the egg d) a and be e) a, b and c
Question 8 (2.25 points) In humans, as in most living mammal species, the _____ provide(s) nutrition...
Question 8 (2.25 points) In humans, as in most living mammal species, the _____ provide(s) nutrition for the majority of fetal development: ( 1) yolk sac O2) placenta O 3) serosa O 4) amnion 05) mammary glands Question 9 (2.25 points) copulatory plugs, the presence of a baculum, faster sperm, large testes, and the presence of genital spines are all a result of natural selection for: O a) asexual reproduction b) protecting embryos from drying out O c) sperm competition...
QUESTION 35 Tetracycline is an antibiotic used to treat bacterial infections in humans because it prevents...
QUESTION 35 Tetracycline is an antibiotic used to treat bacterial infections in humans because it prevents the growth and spread of bacteria. This drug is known to bind strongly and specifically to the A site in the 30S ribosomal subunit. Based on this information you would expect that: a. tetracycline does not affect translation in eukaryotic cells. b. tetracycline inhibits RNA splicing in prokarytes. c. tetracycline will prevent the small ribosomal subunit from binding to the Shine-Dalgarno sequence. d. tetracycline...
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o...
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o complete reliance on wind as the pollinating agent O ovules that are not contained within ovaries carpels that contain microsporangia O double internal fertilization O free-living gametophytes Angiosperm double fertilization is so-called because it features the formation of two embryos from two sperm cells and two eggs. one embryo involving one sperm cell and an endosperm involving a second sperm cell. O one embryo...
34. Which of the following membrane-enclosed organelles is the site of synthesis of membrane proteins and secretory proteins?
34. Which of the following membrane-enclosed organelles is the site of synthesis of membrane proteins and secretory proteins? a) rough endoplasmic reticulum b) smooth endoplasmic reticulum c) nucleus d) centrosome e) Golgi complex 35. Which of the following membrane-enclosed organelles modifies, s destined for other regions of the cell? sorts, and packages proteins a) endoplasmic reticulum b) Golgi complex c) peroxisomes d) nucleus e) proteasome 36. Which of the following membrane-enclosed organelles contains several oxidases that are involved in oxidation of fatty acids and...
FERTILIZATION AND DEILDU Chapter Review 1. Sperms and eggs are examples of C. blastomeres A. sex...
FERTILIZATION AND DEILDU Chapter Review 1. Sperms and eggs are examples of C. blastomeres A. sex organs B.gametes D. zygotes 2. A normal sperm has set(s) of chromosomes. A. 4 c. 2 B. D. 46 1 3. A fertilized egg contains set(s) of chromosomes. c. 2 A. 4 D. 46 B. 1 4. Which one of the following processes marks the beginning of a new life! C. Growth A Fertilization D. Gastrulation B. Specialization Which one of the following terms...
- WERS ON THE SCANTRON SHEET PROVIDE 1. Viruses are known as obligate, intracellular A) Organisms...
- WERS ON THE SCANTRON SHEET PROVIDE 1. Viruses are known as obligate, intracellular A) Organisms B) Symbionts C) Ornelles D) Pass 2. Which of the following is a property of life shared by pokaryote ndaryote A) nucleic acids used to store hereditary information B) the capacity to evolve C) the ability to replicate (reproduce) without invading a host cell D) presence of proteins E) the capacity to mutate , NOV 3. Which of the following is characteristic of the...
nces Mailings Review View Help AaBboct AaB AaBbo . Lolormal 」1NoSpac Heading 1 Heading 2 Title Subtit y.a-圈플 ..|2 Paragraph Styles and 21. The two mechanizms for blocking polyspermy are 22. The cortical granule reaction that occurs after sperma faces with egg cell membrane serves as a slow block to polyspemmy. Which of the following events occur during a cortical reaction? A: Cortical reaction first releases proteases to remove the bounded sperm the egg cell membrane yet B: Cortical reaction...
> Question 19 Which treatment is likely to induce cortical granule reactions? a) UV-irradiating the egg nucleus b) Removal of the zona pellucida from an egg c) Increasing the cytosolic concentration of Ca++ in the egg d) a and be e) a, b and c
Question 8 (2.25 points) In humans, as in most living mammal species, the _____ provide(s) nutrition for the majority of fetal development: ( 1) yolk sac O2) placenta O 3) serosa O 4) amnion 05) mammary glands Question 9 (2.25 points) copulatory plugs, the presence of a baculum, faster sperm, large testes, and the presence of genital spines are all a result of natural selection for: O a) asexual reproduction b) protecting embryos from drying out O c) sperm competition...
QUESTION 35 Tetracycline is an antibiotic used to treat bacterial infections in humans because it prevents the growth and spread of bacteria. This drug is known to bind strongly and specifically to the A site in the 30S ribosomal subunit. Based on this information you would expect that: a. tetracycline does not affect translation in eukaryotic cells. b. tetracycline inhibits RNA splicing in prokarytes. c. tetracycline will prevent the small ribosomal subunit from binding to the Shine-Dalgarno sequence. d. tetracycline...
D Question 45 2 pts Which of the following is a characteristic of all angiosperms? o complete reliance on wind as the pollinating agent O ovules that are not contained within ovaries carpels that contain microsporangia O double internal fertilization O free-living gametophytes Angiosperm double fertilization is so-called because it features the formation of two embryos from two sperm cells and two eggs. one embryo involving one sperm cell and an endosperm involving a second sperm cell. O one embryo...
FERTILIZATION AND DEILDU Chapter Review 1. Sperms and eggs are examples of C. blastomeres A. sex organs B.gametes D. zygotes 2. A normal sperm has set(s) of chromosomes. A. 4 c. 2 B. D. 46 1 3. A fertilized egg contains set(s) of chromosomes. c. 2 A. 4 D. 46 B. 1 4. Which one of the following processes marks the beginning of a new life! C. Growth A Fertilization D. Gastrulation B. Specialization Which one of the following terms...
- WERS ON THE SCANTRON SHEET PROVIDE 1. Viruses are known as obligate, intracellular A) Organisms B) Symbionts C) Ornelles D) Pass 2. Which of the following is a property of life shared by pokaryote ndaryote A) nucleic acids used to store hereditary information B) the capacity to evolve C) the ability to replicate (reproduce) without invading a host cell D) presence of proteins E) the capacity to mutate , NOV 3. Which of the following is characteristic of the...
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