2021 BIO Final EXAM

Each of the following is a main idea of the cell theory except ________________.

• all organisms are composed of cells

• the cell is the basic unit of organization of organisms

• all cells are similar in structure and function

• all cells come from preexisting cells

Ribosomes, labeled as D within the diagram to the right

• transfers energy from sugars to ATP

• stores water

• assembles proteins

• traps light energy and transfers it to sugars

Mitochondria, labeled as G in the diagram

• transfers energy from sugars to ATP

• stores water

• assembles proteins

• traps light energy and transfers it to sugars

You are told that the cells on a microscope slide are plant, animal, or bacterial. You look at them through a microscope and see cell walls and membrane-bound organelles. You conclude that the cells

• are plants cells

• could be plant, animal or bacteria

• are animal cells

• are bacteria

Which selection below correctly represents mitosis and its outcome?

• Mitosis results in the production of four identical cells.

• Mitosis results in the production of gamete cells

• Mitosis results in cells that are identical to the original cell.

• Mitosis results in two genetically different cells.

What is the purpose for the process of mitosis in humans?

• produce cells for sexual reproduction

• produce cells for growth and repair

• cut the chromosome number in cells in half

• double the chromosome number in cells

If an organism has 24 chromosomes in each of its’ cells, how many chromosomes with a new cell have after mitosis?

• 24

• 12

• 48

• 6

A student notices that the lettuce in a salad wilts soon after salt is added. Wilting most likely occurs because the lettuce cells

• swell when exposed to salt.

• absorb the extra salt

• release water in the presence of salt

• lose oxygen when in contact with salt

What will happen to the animal cell seen in the diagram when it is put in the 93% Water/ 7% Sugar solution?

• Water will move into the cell

• Sugar will move into the cell

• Water will move out of the cell

• Sugar will move out of the cell

An ecologist performed a study to determine how the rate of photosynthetic activity in a lake changed from month to month. The results of the study are shown in the graph below.

Which conclusion is best supported by the evidence?

• Photosynthetic organisms were dormant during the months of April through August

• The rate of photosynthesis increased from June through December

• The rate of photosynthesis was greatest during the months of May through July

• Photosynthetic organisms experienced die-off during the months of January through June