Retest 1st 3 weeks exam

Which of the following biological molecules is correctly paired with one of the functions it primarily serves in living cells?

• nucleic acids - store genetic information

• lipids - catalyze chemical reactions

• carbohydrates - component of cytoskeleton

• proteins - long term energy storage

Which statement describes the major role of lipids within a cell?

• They cause DNA to replicate.

• They move RNA in the cytoplasm.

• They catalyze chemical reactions in the cell.

• They are the main components of membranes.

Which of the following characteristics is a similarity between all four major classes of biomolecules?

• They are all made of nucleotides

• They are all made of amino acids

• They are all organic compounds

• They all store energy

What level of organization encompasses an entire, complete living thing?

• Organ system

• Organism

• Organelle

• Organ

What is the simplest level of organization that can be classified as living?

• tissue

• molecule

• cell

• organ

Which structure is not present in a Prokaryotic Cell?

• DNA

• Nuclear Membrane

• Phospholipid Membrane

• Cytoplasm

Answer explanation

Prokaryotic Cells DO have DNA/RNA, have a cell membrane, and have cytoplasm, but DO NOT have a Nucleus. The DNA/RNA is just floating around in the cell.

Which of the following is arranged in the order of INCREASING levels of organization?

• Molecule, atom, cell

• Cell, atom, molecule

• Atom, molecule, cell

• Cell, molecule, atom

Answer explanation

Atom is the fundamental unit of all matter. Molecule is a combination of 2 or more atoms bonded together. A cell is comprised of a complex combination of molecules, atoms, ions, and compounds.

Most viruses have the structural arrangement of....

• a cell wall surrounding the cell membrane

• a capsid shell made from Lipids

• flagella surrounding the cell membrane

• a capsid surrounding a nucleic acid sequence (RNA/DNA)

Answer explanation

A virus is a simple NON-Living entity that consists of primarily a protein encasement (capsid) and some sort of genetic material inside the capsid (RNA/DNA).

What type of cell is described below?

*contains mitochondria

*contains ribosomes

*reproduces by mitosis

*performs photosynthesis

• Bacteria

• Prokaryote

• Virus

• Eukaryote

A scientist observes two cells. Cell 1 and Cell 2 both contain DNA (genetic material) and ribosomes. However, Cell 1 contains a nucleus and other membrane-bound organelles, which Cell 2 does not.

What is the correct classification for each of the cells?

• Cell 1 = Eukaryotic

  Cell 2 = Prokaryotic

• Cell 1 = Prokaryotic

  Cell 2 = Eukaryotic

• Cell 1 = Eubacteria

  Cell 2 = Archaea

• Cell 1 = Archaea

  Cell 2 = Eubacteria

Answer explanation

Eukaryotic Cells are much more complex than Prokaryotic cells. Eukaryotic Cells have organelles and a nucleus.