Concept explainers
To review:
Whether the following statements are true or false:
a. Erythrocyte is a biconcave disc with a prominent nucleus.
b. The main function of erythrocytes is to transport oxygen on the protein hemoglobin.
c. Hemoglobin forms oxyhemoglobin when it binds to oxygen.
d. Hemoglobin consists of two polypeptide chains bound to a heme group.
Introduction:
Blood, a fluid connective tissue, comprises plasma and formed elements. Plasma comprises water and plasma proteins, while the formed elements contain erythrocytes or red blood cells (RBCs), leukocytes or white blood cells (WBCs), and thrombocytes or platelets. Blood circulates throughout the body and performs all the important functions of the body, like the transport of gases, solutes, nutrients, hormones, maintenance of pH, blood clotting, and maintenance of blood pressure.

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Chapter 19 Solutions
MASTERING A&P NEW DESIGN ACCESS
- Calculate the CFU/ml of a urine sample if 138 E. coli colonies were counted on a Nutrient Agar Plate when0.5 mls were plated on the NA plate from a 10-9 dilution tube. You must highlight and express your answerin scientific notatioarrow_forwardDon't copy off the other answer if there is anyarrow_forwardAnswerarrow_forward
- HAND DRAW There should be two proarrow_forwardMolecular Biology Question. Please help solve. Thanks. Please draw how two nucleotide triphosphates are linked together to form a dinucleotide, and label the 5' and 3' ends of the resulting dinucleotide.arrow_forwardWhat is a reversion in molecular biology?arrow_forward
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- 24) Use the following information to answer the question below. Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not. They identify the gene responsible for toxin production. The dominant allele (T) codes for an enzyme that makes the toxin, and the recessive allele (t) codes for a nonfunctional enzyme that cannot produce the toxin. Heterozygotes produce an intermediate amount of toxin. The genotypes of all individuals in the population are determined (see table) and used to determine the actual allele frequencies in the population. TT 0.49 Tt 0.42 tt 0.09 Refer to the table above. Is this population in Hardy-Weinberg equilibrium? A) Yes. C) No; there are more homozygotes than expected. B) No; there are more heterozygotes than expected. D) It is impossible to tell.arrow_forward30) A B CDEFG Refer to the accompanying figure. Which of the following forms a monophyletic group? A) A, B, C, and D B) C and D C) D, E, and F D) E, F, and Garrow_forwardMolecular Biology Question. Please help with step solution and explanation. Thank you: The Polymerase Chain Reaction (PCR) reaction consists of three steps denaturation, hybridization, and elongation. Please describe what occurs in the annealing step of the PCR reaction. (I think annealing step is hybridization). What are the other two steps of PCR, and what are their functions? Next, suppose the Tm for the two primers being used are 54C for Primer A and 67C for Primer B. Regarding annealing step temperature, I have the following choices for the temperature used during the annealing step:(a) 43C (b) 49C (c) 62C (d) 73C Which temperature/temperatures should I choose? What is the corresponding correct explanation, and why would I not use the other temperatures? Have a good day!arrow_forward
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