BIOLOGY EOC Flashcards
A scientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas.
Which group of statements best describe all of the materials he is using in the investigation?
They are each compounds. Each of the compounds is made of atoms. All of the atoms are made of
matter.
They are each made of matter. Some are compounds and some are elements. They all contain atoms.
They are all elements. Some contain molecules of the same type of atom. Some contain different types
atoms.
They are each made of matter. Some are compounds made of one type of element. Some are pure atoms
They are each made of matter. Some are compounds and some are elements. They all contain atoms.
Which type of molecule that can be found in living things lacks carbon atoms?
water
A scientist is examining the role of an element found in fats and carbohydrates of living things. This element makes up 65% of human body mass.
Which statement describes the element he is studying?
He is studying oxygen, which can also be found in proteins.
Which element is found in both DNA and protein?
nitrogen
Responding to the environment is a characteristic of life best shown by which example?
a human shivers on a cold day
Organisms may contain up to five levels of organization within their bodies. Which level of organization is best represented by the liver?
organ
The heart is an example of which level of organization within an organism?
organ
Which level of organization is seen In both Arachnoidiscus ehrenberg/ and the human stomach?
cell
Which general formula can be used to identify carbohydrates?
Cx(H2O)y
Suppose a chemist has two fatty acids and wants to identify which one is saturated and which one is unsaturated. She has discovered that they have the same chain length. She can identify the saturated fatty acid because it has more
hydrogen atoms
Which is an important function of lipids in the body?
provide the body with vilamins and bile salts
Which statement describes the phospholipid bilayer that makes up a cell membrane?
The hydrophilic heads point into and out of the cell, while the hydrophobic tails form a layer between the heads
