Practice Exam 1 Flashcards
Which of the following is not a general characteristic of all living things? Responsiveness to environmental changes. —–Contain nuclei acids, proteins, carbohydrates, and lipids.
- Composed of tissues.
- Reproduction.
- Composed all at least one cell
Composed of tissues
Metabolism is specifically defined as
The sum total of all chemical reactions occurring in the body
When an organism loses control of its ability to maintain homeostasis it is
Diseased or dead
At what level of structural organization or Atoms
Chemical or molecular
If the outer electron shell is completely filled, then the Atom is?
Stable
The strong bonds that usually form between carbon and hydrogen are called
Covalent bonds
Individually weak bonds that form between water molecules due to water molecules being polar are called
Hydrogen bonds
What specific property of water best explains the cooling effect of sweating
High heat of vaporization
The pH of the solution is an indication of its
Acidity
Buffers are important to human physiology mostly because they
Stabilize the pH of a solution
Monosaccharides, this saccharides, and polysaccharides are all
Carbohydrates
Carbohydrates are important to our body mainly because they
Provide energy
A biologist heading proteins would identify the simplest subunit monomers as
Amino acids
Triglycerides are so named because they are formed by joining of three fatty acid molecules to one
Glycerol
Enzymes are proteins that generally function to?
Speed up chemical reactions
And analysis of nucleotides in a complex molecule yielded equal amounts of adenine and thymine. what was the molecule
Deoxyribonucleic acid DNA
As the surface area of a cell increases, the volume of the cell
Increases at a faster rate
Which of the following form a double layer and make up the largest number of the molecules found in the plasma membrane
Phospholipids
When a membrane is said to be “selectively permeable” this means that
The cell regulates what passes in and out
The process whereby small molecules can passively travel through a membrane by moving from an area of high concentration to an area of low concentration is called
Diffusion
If blood cells are added to hypertonic salt solution what will happen to them
They will shrink
The____is bounded by double membrane with pores and contains the cells genetic material
Nucleus
A cell with a great deal of rough endoplasmic reticulum would most likely be heavily involved in
Protein synthesis
Which organelles perform sorting, modifying, packaging and shipping functions
Golgi complex
