Vectors must have at least one restriction enzyme recognition site
Indicate whether this statement is true or false.
TRUE
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Why do histone genes have the slowest molecular clock?
A. The structure of the histone gene must be conserved for DNA to function properly. B. Histone genes simply do not have the same rate of mutations. C. DNA-correcting mechanisms function more readily with histone genes. D. Cells have more histone genes than any other kind of gene. E. Histone genes normally have selfcorrecting mechanisms.
Which of the following is TRUE with regard to the sliding filament mechanism of muscle contraction?
A) When a muscle fiber is contracting, the thin fibers are connected to the thick fibers. B) The energy for contraction comes from the breakdown of actin into myosin. C) The muscle relaxes when calcium ions are released into the fluid surrounding the thick and thin filaments. D) When actin pushes the Z discs farther apart, the muscle contracts.
Which list shows the set of plant macronutrients that make up about 98% of a plant's dry weight?
A) carbon, oxygen, hydrogen, potassium, zinc, and copper B) carbon, nitrogen, potassium, manganese, sulfur, and phosphorus C) nitrogen, potassium, manganese, sulfur, copper, and phosphorus D) carbon, oxygen, hydrogen, nitrogen, sulfur, and phosphorus
Larger genes are usually more likely to incur a mutation than smaller genes.
Answer the following statement true (T) or false (F)