A cell can be classified based on the structures present in the cell. This illustration shows three different types of cells.

Which structure is common to all three types of cells?

Select the 3 correct parts that make up cell theory.

Which of the following is a function of the cell membrane?

Which best explains why muscle cells have more mitochondria than skin cells?

Which characteristic is observed in both prokaryotic and eukaryotic cells?

Which statement describes the major difference between prokaryotic and eukaryotic cells?

Which correctly matches the cell process to the organelle in which it occurs?

A scientist wants to trace the path of a protein from synthesis to when it is shipped out of the cell. Which of the following correctly sequences the organelles that are involved?

A scientist at the polar ice cap was studying an ice sample from hundreds of meters below the surface. While examining the ice, the scientist found some cells from many years ago. Using an electron microscope, the scientist identified these cell structures: cytoskeleton, mitochondrion, nucleus, cell wall, and ribosomes. What kind of organism did the scientist find?

Andrew is making a model of a eukaryotic cell. Which of the following should be included in his model? Select 3 answer choices.

Cyanide bonds with at least one of the molecules involved in the production of ATP. Following exposure of a cell to cyanide, most of the cyanide could be expected to be found within the...

Which statement best supports the idea that eukaryotic cells evolved after prokaryotic cells?

This is an illustration of an intestinal cell.

Cells that line the intestines break down food and absorb nutrients. Which cellular organelle performs a similar function for cells?

A doctor sees a patient who has kidney failure, lack of motor coordination, and a poorly functioning nervous system. After testing, the doctor finds that these symptoms are all related to a chronic lack of energy in some of the patient's cells. The doctor diagnoses a metabolic disorder known as Leigh's disease.

Based on this evidence, a malfunction in what organelle is most likely responsible for Leigh's disease?

Alex was brought into the clinic by his football coach, who stated that Alex is delirious, has intense cramps, and has been vomiting since he drank over 1,000 mL of water in under 45 minutes at football practice. Normally, the sodium concentration inside the cells is equal to the sodium concentration outside of the cell. However, drinking this much water in a short time will cause the inside of the cell to become diluted. To compensate, water from the outside of the cell will rush into the cell, causing water intoxication. Which cell organelle allows this to happen?

Jose entered the clinic with severe back and abdominal pain. Nurse Ann has already done bloodwork and found no abnormalities. Jose was sent for an Xray of his abdomen, where the tech found an obstruction in his intestines. This is probably due to the inability of the intestinal cells to package the needed enzymes and bile for shipment to the intestines. Which cell organelle is the cause of Jose's pain?

Paul has been sick for several days and has a fever of 102 degrees. A few days ago, he visited the ER, where the attending physician diagnosed him with a bacterial infection. It's been 3 days, but Paul's body has been unable to fight the infection. Bloodwork has been completed and lab results indicate that the vacuoles in Paul's white blood cells are successfully trapping the bacteria; however, the organelle responsible for releasing enzymes that break down the bacteria's cell walls is not working properly. Which organelle is malfunctioning?

Who said that cells must arise from preexisting cells?

What did Anton van Leeuwenhoek call the tiny mobile creatures he observed with his microscope?

The first observation of cells under a microscope was made by

Who first observed the presence of cells in plants?

Which 3 scientists are credited with contributing to the cell theory?

Who first observed the presence of cells in animals?

What invention made it possible to view cells?