Question

· Question 35

0 out of 2 points

	Why is it so difficult to design a vaccine against HIV?

· Question 37

0 out of 2 points

	Which of the following is NOT a characteristic of cancer ?

· Question 39

2 out of 2 points

	Cancer could be caused by _________.

· Question 41

0 out of 2 points

	Tumor-suppressor genes _____.

· Question 43

0 out of 2 points

	The example of a chromosomal rearrangement that resulted in a ligand-independent form of the EGF receptor results in tumor formation. The gene that encodes the EGF receptor would be classified as?

· Question 44

0 out of 2 points

	Cancer can arise from (select all that apply): 1 Gain-of-function mutations in tumor suppressors 2 Loss-of-function mutations in tumor suppressors 3 Gain-of-function mutations in oncogenes 4 Loss-of-function mutations in oncogenes 5 Loss-of-function mutations in DNA repair genes

· Question 45

2 out of 2 points

	Which statement about the Rb tumor suppressor protein is NOT true?

· Question 46

0 out of 2 points

	What is the function of reverse transcriptase in retroviruses?

· Question 47

0 out of 2 points

	Which type of disorder is most difficult to correct by gene therapy?

· Question 48

2 out of 2 points

	Gene therapy requires__________.

· Question 49

0 out of 2 points

	Plants are more readily manipulated by genetic engineering than are animals because_________.

· Question 50

0 out of 2 points

	Genetically engineered plants ________.

· Question 51

2 out of 2 points

	How old is the earth thought to be based on radiometric measurements?

· Question 52

2 out of 2 points

	Different cell organelles differ from each other in terms of their molecular components and structure. For example, lysosomes are packed with digestive enzymes and function in the degradation or turnover of cellular components. How are lysosomes populated with the digestive enzymes?

· Question 53

2 out of 2 points

	Animal cells are protected from their environment by a thin plasma membrane. The membrane must be strong to be protective. What holds the plasma membrane together?

· Question 54

0 out of 2 points

	Your lungs and respiratory tract are cleared of particles that you breathe in, such as pollen or other air borne particulates, by the waving motion of cilia lining your respiratory tract. What are the underlying subcellular structures or processes that sponsors this movement in cilia?

· Question 55

0 out of 2 points

	What are examples of a cellular oxidation reactions?

· Question 56

0 out of 2 points

	Enzyme catalyzed reactions

· Question 57

0 out of 2 points

	What metabolite is formed in the terminal step of glycolysis that is taken up my mitochondria?

· Question 58

0 out of 2 points

	The ultimate electron acceptor in cellular respiration is _______________, while the ultimate electron donor in the light reactions of photosynthesis is ___________________.

· Question 59

0 out of 2 points

	According to the chemiosmotic hypothesis, the energy from electron transport in mitochondria

· Question 60

0 out of 2 points

	Less energy is derived from the fermentation of glucose than from its breakdown by cellular respiration because there is less free energy difference between glucose and the products of fermentation.

· Question 61

0 out of 2 points

	Grocery products list the fat and saturated fat content on most processed foods. Saturated fats are thought to be more of problem to human health than unsaturated fats because saturated fats ………

· Question 62

0 out of 2 points

	While wading in swallow seawater, you found a jellyfish, picked it up, rinsed it off and put it in a bucket of tap water. What is likely to happen to cells of the jellyfish?

· Question 63

2 out of 2 points

	Glucose is one of the important nutrients in meeting the energy needs for the cells in your body. One means by which glucose is taken up by cells is through facilitated diffusion. In facilitated diffusion, glucose is taken up …

· Question 64

0 out of 2 points

	If eukaryotic cells didn’t have internal organelles, how would they likely differ?

· Question 65

2 out of 2 points

	What is the relationship between the rough endoplasmic reticulum (RER) and the Golgi apparatus?

· Question 66

2 out of 2 points

	About how many ribosomes might be found in a typical animal cell?

· Question 67

2 out of 2 points

	Some large molecules, such as proteins, are synthesized in the cytoplasm but are required for functions in the nucleus. How do large molecules, such as proteins get into the nucleus?

· Question 68

0 out of 2 points

	The free energy change (ΔG) for synthesis of ATP is +7.3 kilocalories/mole and ΔG for the breakdown of glucose is -686 kilocalories/mole. If ~29 ATP molecules are formed from each glucose molecule during cellular respiration, then about how efficient is cell respiration converting the energy from glucose into ATP?

· Question 69

2 out of 2 points

	Photosynthesis produces most all the oxygen in the air we breathe. Where does oxygen come from in photosynthesis?

· Question 70

0 out of 2 points

	Steroid hormones are lipid-soluble hormones and their cell receptors ….

· Question 71

0 out of 2 points

	If not all the nuclear DNA in a cell is synthesized during S phase in the cell cycle, then what is to prevent the cell from dividing?

· Question 72

0 out of 2 points

	In what direction are DNA strands synthesized?

· Question 73

0 out of 2 points

	Replication of your DNA has to be a very faithful to maintain the integrity of your genome. DNA polymerase inserts an incorrect deoxyribonucleotide every 100, 000 bases.

· Question 74

0 out of 2 points

	RNA synthesis and processing differs somewhat between prokaryotes and eukaryotes.

· Question 75

0 out of 2 points

	Translation in prokaryotes

· Question 76

2 out of 2 points

	Which of the following processes are important for normal development?

· Question 77

0 out of 2 points

	Within an organism, what makes one cell type different from another?

· Question 78

0 out of 2 points

	What makes each insect body segment different from another?

· Question 79

2 out of 2 points

	Which of the following molecules, structures or organelles is NOT found in prokaryotic cells?

· Question 80

2 out of 2 points

	Which answer below places molecules or subcellular structures in the correct order by size, from smallest to largest?

· Question 81

0 out of 2 points

	Which statement is correct concerning stem cells in animals and meristems in plants?

· Question 82

0 out of 2 points

	Cell differentiation always involves _____.

· Question 83

0 out of 2 points

	Which of the following statements about the DNA in one of your brain cells is true?

· Question 84

0 out of 2 points

	Which of the following properties describes the importance of epithelia in maintaining homeostasis?

· Question 85

0 out of 2 points

	Which of the following most accurately describe the concept of “pattern formation” during embryogenesis?

· Question 86

0 out of 2 points

	Based on the figure above, showing hemoglobin saturation curves under (A) normal CO2 and (B) elevated CO2 concentrations, which of the following conclusions is true?

· Question 87

0 out of 2 points

	Which of the following does NOT require hemoglobin to deliver oxygen to the tissues.

· Question 88

0 out of 2 points

	Circulatory systems compensate for _____.

· Question 89

0 out of 2 points

	Which observation is evidence for genetic equivalence in plants or animals?

· Question 90

0 out of 2 points

	What is the relationship between the endosperm of corn and the cotyledons of beans?

· Question 91

0 out of 2 points

	Which factor contributes to driving the flow of water through xylem?

· Question 92

0 out of 2 points

	According to the pressure-flow hypothesis of phloem transport, _____.

· Question 93

0 out of 2 points

	A bicoid loss-of-function mutant lacks a head while injection of normal Bicoid+ mRNA into the posterior end of an oocyte produces embryos with 2 heads. This indicates that the normal Bicoid+ gene function is

· Question 94

2 out of 2 points

	A molecule that during development provides positional information via a concentration gradient is known as a

· Question 95

0 out of 2 points

	An advantage of asexual reproduction is that it _____.

· Question 96

2 out of 2 points

	An advantage of cross-pollination is that _____.

· Question 97

0 out of 2 points

	When a mammalian embryo implants into the uterine wall, the embryo produces chorionic gonadotropin (hCG) hormone, which

· Question 98

0 out of 2 points

	Which of the following represents the correct sequence of events for sexual reproduction in most vertebrates?

· Question 99

0 out of 2 points

	Embryonic stem cells have advantages for research and possible therapeutic applications because

· Question 100

0 out of 2 points

	Plant development is different from animals because plant development