Describe the composition of a nucleosome.
What will be an ideal response?
A DNA molecule wrapped around a spool of histones.
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In adaptive immunity, pathogen specific receptors are produced in large numbers only after exposure to the pathogen or its products
Indicate whether the statement is true or false.
If the efficiency of the alveoli in an human was reduced by 50%, what would you predict would be the effect?
A. The volume of air in the lungs would decrease by 50%. B. The affinity of hemoglobin for oxygen would decrease by 50%. C. The rate of gas exchange would decrease by 50%. D. The muscular control of breathing would decrease by 50%.
Human Hox genes are in four clusters: HOXA, HOXB, HOXC, and HOXD, for a total of 39 genes. Besides conserving the clustering of genes, evolution has also conserved __________
A) their chromosomal locations B) the order of the genes within them C) their expression along the dorsal-ventral axis D) the mutations to which they give rise E) their bilateral symmetry
The kidneys excrete metabolic wastes, including urea, a by-product of glucose metabolism.
Answer the following statement true (T) or false (F)