To survive, prokayotic cells in this category would have special water binding proteins? a. acidophile b....
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To
survive, prokayotic cells in this category would have special water
binding proteins?
a. acidophile
b....
Why do cells lack membrane transport proteins that are specific for the movement of Oz? Choose...
Why do cells lack membrane transport proteins that are specific for the movement of Oz? Choose one: A. because oxygen is transported in and out of the cell by special oxygen-binding proteins such as hemoglobin B. because oxygen concentrations must be kept low inside cells to avoid creating reactive superoxide radicals that can damage DNA and proteins C. because oxygen, dissolved in water, can enter cells via aquaporins D. because oxygen dissolves readily in lipid bilayers E. because transport of...
Please answer 3&4 W GIVOTU Muu ovat LED uro. QUESTION 3 Suppose you place yeast cells...
Please answer 3&4
W GIVOTU Muu ovat LED uro. QUESTION 3 Suppose you place yeast cells in two different environmental conditions to observe their growth. Flask A contains nutrient broth that has minimal amounts of glucose and is incubated at 37°C with aeration (like a bubbler in a fishtank). Flask B has the same media, is incubated at 37°C and is kept in an anaerobic environment. The yeast are facultative anaerobes. Which culture had the greater number of cells? Flask...
Special channels called aquaporins allow water to move between cells. These channel proteins are selective- they...
Special channels called aquaporins allow water to move between cells. These channel proteins are selective- they freely let water molecules through the membrane but NOT ions or other molecules- but (like leak channels) are not gated.Based on those facts, state which of the following would be the most likely to determines the direction (and how quickly) water can move across a membrane using aquaporins, and (in a few sentences) explain your answer. how much ATP is present inside the cell...
In order to survive negative selection and exit the thymus, single-positive T cells must express: answers:...
In order to survive negative selection and exit the thymus, single-positive T cells must express: answers: a. both CD4 and CD8 b. IL-2 receptor (CD25) and CTLA-4 c. TCR which have high affinity for self-antigen d. both an alpha-beta and gamma-delta TCR on the cell surface e. TCR which have weak affinity for self-antigen
Small acid soluble proteins (SASPs): a membrane-bound proteins in acidophilic bacteria. b. secreted by acidophiles. c....
Small acid soluble proteins (SASPs): a membrane-bound proteins in acidophilic bacteria. b. secreted by acidophiles. c. DNA-binding proteins in endospores. d. Proteins that surround gas vesicles. Poly-B-hydroxybutyrate (PHB) is a. a component of bacterial endospores c. a storage product within bacterial cells b, a component of LPS d. a component of peptidoglycan Calcium dipicolinate is a a component of bacterial endospores c. a storage product within bacterial cells b. a component of LPS d. a component of peptidoglycan
42. Which statement is NOT true about DNA? a) DNA acts like an enzyme by binding...
42. Which statement is NOT true about DNA? a) DNA acts like an enzyme by binding amino acids together using dehydration synthesis. b) Before cells divide both strands must be copied and one is provided for each new cell cm RNA is copied from a piece of DNA termed a gene. d) DNA is not always copied perfectly. Mistakes, mutations, occur and result in changed proteins, e) DNA functions as code for the synthesis of proteins. 43. A section of...
2. Which of the following cells are leukocytes? a. NK cells b. neutrophils c. monocytes d....
2. Which of the following cells are leukocytes? a. NK cells b. neutrophils c. monocytes d. all of the above e. none of the above 3 Which of the following cells are lymphocytes? a. NK cells b. neutrophils c. monocytes d. all of the above e. none of the above 4. Why do complement proteins not damage healthy cells normally? a. Complement proteins must be produced by activated leukocytes. b. Complement proteins must be activated by enzymatic cleavage. c. Leukocytes...
Lectins are carbohydrate-binding proteins that have been implicated in a wide range of disease conditions in...
Lectins are carbohydrate-binding proteins that have been implicated in a wide range of disease conditions in humans. Discuss the role of bacterial lectins in the mechanism of human infection. Use the following questions to guide your answer: a. How does the typical molecular structure of lectins look? b. What chemistry is involved when lectins bind specifically to carbohydrates? c. How does lectin-ligand binding lead to entry of the bacterium into a host cell? d. What is an example of a...
1. Which one of the following is not a function of proteins dissolved in the plasma?...
1. Which one of the following is not a function of proteins dissolved in the plasma? A. Transporting O2 in the blood. B. Playing roles in blood clotting. C. Promoting reabsorption of fluid into capillaries. D. Contributing to the osmolarity of the blood. E. Serving as antibodies. 2. Which of the following is true about B cell antigen receptors but not T cell antigen receptors? Only B cell antigen receptors… A. have both light and heavy chains. B. contain disulfide...
For the enhanceosome, binding sequences are on both strands of DNA. Why? The proteins of the...
For the enhanceosome, binding sequences are on both strands of DNA. Why? The proteins of the enhanceosome on one strand have a regulatory function, whereas those on the other strand bend the DNA strand. The proteins on one side of the strand bind to GC rich regions and those on the other strand bind to AT rich regions. The proteins of the enhanceosome completely enclose the double helix and straightened the double helix. The proteins on one strand clear the...
Why do cells lack membrane transport proteins that are specific for the movement of Oz? Choose one: A. because oxygen is transported in and out of the cell by special oxygen-binding proteins such as hemoglobin B. because oxygen concentrations must be kept low inside cells to avoid creating reactive superoxide radicals that can damage DNA and proteins C. because oxygen, dissolved in water, can enter cells via aquaporins D. because oxygen dissolves readily in lipid bilayers E. because transport of...
Please answer 3&4
W GIVOTU Muu ovat LED uro. QUESTION 3 Suppose you place yeast cells in two different environmental conditions to observe their growth. Flask A contains nutrient broth that has minimal amounts of glucose and is incubated at 37°C with aeration (like a bubbler in a fishtank). Flask B has the same media, is incubated at 37°C and is kept in an anaerobic environment. The yeast are facultative anaerobes. Which culture had the greater number of cells? Flask...
Small acid soluble proteins (SASPs): a membrane-bound proteins in acidophilic bacteria. b. secreted by acidophiles. c. DNA-binding proteins in endospores. d. Proteins that surround gas vesicles. Poly-B-hydroxybutyrate (PHB) is a. a component of bacterial endospores c. a storage product within bacterial cells b, a component of LPS d. a component of peptidoglycan Calcium dipicolinate is a a component of bacterial endospores c. a storage product within bacterial cells b. a component of LPS d. a component of peptidoglycan
42. Which statement is NOT true about DNA? a) DNA acts like an enzyme by binding amino acids together using dehydration synthesis. b) Before cells divide both strands must be copied and one is provided for each new cell cm RNA is copied from a piece of DNA termed a gene. d) DNA is not always copied perfectly. Mistakes, mutations, occur and result in changed proteins, e) DNA functions as code for the synthesis of proteins. 43. A section of...
2. Which of the following cells are leukocytes? a. NK cells b. neutrophils c. monocytes d. all of the above e. none of the above 3 Which of the following cells are lymphocytes? a. NK cells b. neutrophils c. monocytes d. all of the above e. none of the above 4. Why do complement proteins not damage healthy cells normally? a. Complement proteins must be produced by activated leukocytes. b. Complement proteins must be activated by enzymatic cleavage. c. Leukocytes...
For the enhanceosome, binding sequences are on both strands of DNA. Why? The proteins of the enhanceosome on one strand have a regulatory function, whereas those on the other strand bend the DNA strand. The proteins on one side of the strand bind to GC rich regions and those on the other strand bind to AT rich regions. The proteins of the enhanceosome completely enclose the double helix and straightened the double helix. The proteins on one strand clear the...
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