Show:
DNA,RNA, Biology
Starches and Proteins
Cells
Bonds
Random
100
True or False nonequilibrium state – energy is constantly required to maintain the complexity of life
What is False
100
The monomers of polysaccharides are
What is sugars that are in the form of rings
100
Which of the following is the smallest level of the hierarchy of biological organization on the list below? a. Cells b. Ecosystems c. Organelles d. Molecules e. Communities
What are Molecules
100
Atoms and molecules can become charged when they gain or lose an electron. Which of the following is the term or phrase for an atom or molecule that has a charge?
What is and ion
100
Which statement is true: Life is unified by all living organisms a. being part of the same species. b. having similar macromolecules. c. being multicellular. d. each emerging by individual spontaneous generation events. e. individual living organism having different alleles from each other.
What is *b. having similar macromolecules.
200
The main function of DNA in living organisms, including plants, animals and bacteria, is to
What is to store information for a long time (between generations of cells or organisms). d. store information for a short time (minutes to hours).
200
Common to the breakdown of polysaccharides to disaccharides, proteins to amino acids and DNA to deoxynucleotides?
What are hydrolysis reactions
200
All multicellular animals are part of the domain
What is eukarya
200
Which property of water below is correctly matched with an example of that property? a. water organizes nonpolar molecules – lipid bilayers of phospholipids form in aqueous solutions b. water has a high specific heat – salt dissolves in water c. water is a good solvent for ions and polar molecules – temperatures are more constant in areas with a lot of water than in dry areas, like deserts d. solid water is less dense than liquid water – the evaporation of sweat cools animals e. the high heat of vaporization – the bottom of ponds stay more liquid than the surface in winter
What is *a. water organizes nonpolar molecules – lipid bilayers of phospholipids form in aqueous solutions
200
a. is supported by many types of experimental evidence. b. is one of the ideas of which we are most certain. c. is supported by scientific reasoning. d. is a body of interconnected concepts.
What is Scientific Theory
300
Which of the following is correctly matched with the carbon it is attached to in a DNA polymer? a. 3’ to a nitrogenous base b. 4’ to a nitrogenous base c. 5’ to a phosphate d. 1’ to phosphate e. 2’ to a hydroxyl group
What is *c. 5’ to a phosphate
300
Depending on the type and isomer of monosaccharides used to make a polysaccharide, the result will be
What is different. The result may be one of many polysaccharides, like cellulose, glycogen or a starch.
300
Pasteur ran experiments testing the germ hypothesis that preexisting organisms in the air contaminate sterile broth and the spontaneous generation hypothesis that living organism spontaneously generate from nonliving organic molecules. In class we discussed the experiments and the conclusion that the germ hypothesis was correct and the spontaneous generation hypothesis was false. What result would have supported the spontaneous generation hypothesis?
What is microorganisms in the sterilized broth with the flask neck intact
300
Due to the difference in the electronegativity of oxygen and hydrogen, in one molecule of water
What is a partial negative charge on the oxygen and a partial positive charge on hydrogen.
300
Imagine you are an alien from a world without flashlights. You make some observations on Earth and develop a hypothesis that flashlights require batteries to work. You do an experiment where you show that twenty flashlights without batteries do not work. An important control experiment is to show
What is that the flashlights do work with batteries.
400
The backbone of RNA is made by
What is covalent phosphodiester bonds between sugar and phosphate groups.
400
Part of a protein is found in the center of a protein away from water. You would predict that this part of the protein contained
What are nonpolar amino acids.
400
Which of the following is a characteristic of both living organisms and non-living materials?
They can contain oxygen and hydrogen
400
Imagine an organic molecule that has a hydroxyl group that interacts with water. The bond between the water molecule and the hydrogen atom of the hydroxyl on the organic molecule is a(n)
What is a hydrogen bond.
400
Good science proceeds by
What is making hypotheses that make predictions.
500
When two strands of DNA make a double helix, the nitrogenous base of the purine adenine (A) makes
What is hydrogen bonds with the pyrimidine thymine (T).
500
You would predict that a triglyceride that came from a plant would
What is have at least one double bond in a fatty acid.
500
Why do phospholipids form bilayers?
They form bilayers because the hydrophobic tails can minimize contact with water and the hydrophilic end can minimize contact with lipids.
500
Given that the electronegativity of hydrogen (H) is 2.1, of carbon (C) is 2.5, of nitrogen (N) is 3.0, of oxygen (O) is 3.5, and of sulfur (S) is 2.5, which of the following bonds would be the LEAST polar? a. H to N b. C to H c. H to O d. S to O e. C to O
What is *b. C to H
500
Which of the following statements about pH is true? a. a solution with a pH of 11 has more free hydrogen ions than a solution with pH of 4. b. A solution with a pH of 3 is neutral, not acidic nor basic. c. When the pH is low the solution is basic. d. When the pH is low there are more hydrogen ions in the solution. e. Buffers increase the changes in pH in response to adding acid.
What is *d. When the pH is low there are more hydrogen ions in the solution.