Atomic mass refers to the sum of the number of ________ and ________ of an atom.

What will be an ideal response?


protons, neutrons
neutrons, protons

Biology & Microbiology

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Which of the following types of microscopy can be used with live cells?

A) phase-contrast microscopy B) transmission electron microscopy C) bright-field microscopy D) scanning electron microscopy

Biology & Microbiology

What will happen to the pH inside of a thylakoid that is exposed to light?

A. It will increase. B. It will depend on the starting pH of the stroma. C. It will depend on the starting pH in the thylakoid. D. It will not change. E. It will decrease.

Biology & Microbiology

In DNA molecules,

cytosine pairs with adenine. thymine pairs with uracil. adenine pairs with uracil. adenine pairs with thymine. cytosine pairs with thymine.

Biology & Microbiology

Why does it matter that HIV is a provirus?

A. Its genetic makeup is more complex than other viruses. B. It does not have to bind to living cells to survive. C. It can incorporate itself into the host cell's DNA and lay dormant for a long period. D. It is able to reproduce itself where other viruses are not.

Biology & Microbiology