The group of molecules called nucleotides contain:

A) phosphate groups.

B) pyrimidines.

C) purines.

D) pentose (a 5-carbon sugar).

E) all of the above.

A neutral charge by an atom is caused by which of the following conditions? a. presence of neutrons in the nucleus b. balance in number of protons and neutrons c. balance in number of electrons and protons d.

A 0.1 m solution of which salt is the most basic? (a) nano3 (b) naclo4 (c) nahso4 (d) nahco

What part of the scientific method often takes the form of an if-then statement? Question 1 options: experiment conclusion hypothesis question

What does d represent in the equation below? m = M + 5 log (d/10) A. luminosity B. spectral class C. diameter of a star D. distance to a star

Would the law of conservation energy make sense if scientist did not reconised the concept of potential energy

The atomic weight of hydrogen is 1.00794. a. True b. False

Describe What kind of ions do metals form? What kind of ions do nonmetals form?

A car is driven through streets treated with salt and then parked in a warm garage. a) How will the rate of rusting compare with a car that has not been driven in the streets treated with salt but left parked outside?

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin

Which fossil fuel is the most widely consumed in the United States? A. petroleum B. natural gas C. peat D. coal