The flashcards below were created by user
Anonymous
on FreezingBlue Flashcards.
-
The main difference between an autotroph and a heterotroph is...
how they obtain energy
-
The basic difference between a prokaryotic cell and a eukaryotic cell is that the prokaryotic cell
lacks a nucleus
-
In evolutionary terms, which cell listed is considered to be most primitive?
prokaryotic
-
Which correctly indicates the sequence of increasing organization?
cell, tissue, organ, organ system
-
A typical animal would be characterized by all of the following EXCEPT
All of these are true
-
We use the scientific method every day. Imagine your car doesn't start one morning before school. Which of these is a reasonable hypothesis regarding the problem?
I'm out of gas
-
You observe a plant on your windowsill that is growing at an angle toward the outside. This is an example of a living thing
responds to stimuli
-
A carefully formulated scientific explanation that is based on a large accumulation of observations and is in accord with scientific principles is termed a/an
theory
-
Which is NOT an example of evolution?
A dog learns how to open the cabinet where its food is kept.
-
A mutation is...
a change in DNA sequence
-
What is the maximum number of covalent bonds an element with atomic
number 8 can make with hydrogen?
2
-
What is the difference between covalent bonds and ionic bonds?
Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between atoms
-
How does one explain the formation of ions?
gain or loss of electrons
-
If a substance measures 5 on the pH scale, that substance
- has greater concentration of H+ than OH-
- ions
-
Which of the following would be least affected by the presence of water?
a nonpolar covalent bond
-
Which of the following represents a molecule characterized by polar
covalent bonding?
H2O
-
Phosphorus has an atomic number of fifteen, so what will be the distribution of its electrons?
- The first energy level will
- have two, the second will have eight, and the third will have five.
-
Why is a neon atom (Atomic #10) more stable than a nitrogen atom (Atomic #7)?
Eight electrons completely fill its outermost electron shell.
-
What determines the cohesiveness of water molecules?
hydrogen bonds
-
A substance with specific properties that cannot be broken down or converted to another substance is a(n)
element
-
Which of the following BEST summarizes the relationship between dehydration reactions
and hydrolysis?
Dehydration assembles polymers, hydrolysis breaks down
-
Of what are fats composed?
3 fatty acids, and 1 glycerol
-
Which of the choices is a monosaccharide found in DNA?
deoxyribose
-
Organisms contain thousands of different proteins composed of ________ different amino
acids.
20
-
Which of the following may possess primary, secondary, tertiary and quaternary
structure?
proteins
-
Which of the following macromolecules possess large nonpolar regions making them
insoluble in water?
lipids
-
Phospholipids are unusual and important to cell structure because…
they have a polar and non polar end
-
A nucleotide is...
Phosphate, sugar, base
-
Chitin in an example of a ______.
Polysaccharide
-
When a hydrolysis reaction breaks down the disaccharide sucrose, what two monosaccharides are produced?
Glucose and fructose
|
|