Excalibur bought 3,000 pounds of materials for $2,850. They used 2,800 pounds to produce 1,000 units of output. Direct labor costs totaled $18,000 for 600 hours of work. Standards have been set as follows:Direct Materials: 2 pounds @ $1.10 per pound Direct Labor: .5 hours @ $32 per hour The materials price (spending) variance is:

Answer the question based on the following molecule: CH3CH2CH=CH(CH2)6COOH a.  How many carbons are there in this molecule? b. What type of molecule is this?  

Sodium-24 has a half-life of 15 hours.  How much time has passed when only 12.5% of the original sample remains? Give an answer without units

A eukaryotic animal would include differentiated muscle and nerve cells.  Muscle cells differ from nerve cells in structure and function mainly because 

Explain the differences between DNA and RNA.

Given the following DNA strand, which of the following represent a complementary strand of DNA bases? AACGTCAT

How much energy, in kJ, is released when 150 g propane is burned?  C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (g) + 2201 kJ

A mutant bacterial cell has a defective aminoacyl-tRNA synthetase that attaches a lysine to tRNAs with the anticodon AAA instead of the normal phenylalanine. What would be a potential consequence for a cell in which this happens? Remember that phenylalanine may be encoded by multiple codons.

How many joules of energy will a stock tank heater rated at 40 watts use in a 1 hourperiod?

Which of the following mechanisms removes nucleotides that are paired incorrectly during DNA replication?