Exam 2: Are We Alone in the Universe? Water, Biochemistry, and Cells

In what unit of a eukaryotic cell are ribosomes made?

Mitochondria convert food energy into a high-energy molecule that is directly usable by the cell, called ________.

Which of the following is a lipid?

Nonliving things include fire, water, and viruses. Many features of living things are also found in nonliving things. Of the following features, which is most likely to be absent in nonliving things?

Polysaccharides are polymers of

The plasma membrane of a photosynthetic eukaryotic cell

Which organelle is a stack of membranous sacs that are involved in sorting proteins to their proper cellular location?

Inside a eukarotic cell, the organelles are located within a watery matrix called the ________.

Which cell component is composed of microtubules and helps move chromosomes around during cell division?

What kind of molecule forms a bilayer that is the basis for all cellular membranes?

What is the name for the ability of living things to maintain a relatively constant internal environment?

Oxygen in highly electronegative, meaning that it

Which of the following is considered part of a life-form's metabolism?

Scientists believe that the first prokaryotes on Earth arose over ________ years ago, and the first eukaryotes arose about ________ years later.

If life on Mars is fundamentally like life on Earth, its macromolecules will be based on which element?