HUMAN BIOLOGY Test Questions

Which of the following levels of organization is the largest?
A. tissue
B. organ
C. cell
D. organ system

Which term refers to a direction towards the body midline?
A. dorsal
B. anterior
C. medial
D. lateral

Which term refers to a direction away from the attachment site of a limb?
A. distal
B. posterior
C. anterior
D. proximal

Which term refers to the back of a body or structure?
A. proximal
B. anterior
C. posterior
D. distal

Which regional term refers to the posterior aspect of the head?
A. cubital
B. popliteal
C. brachial
D. occipital

Which regional term refers to the upper part of the arm?
A. brachial
B. popliteal
C. occipital
D. cubital

Which regional term refers to the wrist?
A. sacral
B. carpal
C. axillary
D. brachial

Which is contained in the nucleus of an atom?
A. protons
B. electrons
C. neutrons
D. both a and c

All atoms of the same element have to have the same number of
a, neutrons
b. protons
c. electrons
d. molecules

Which particle in an atom is negatively charged?
A. protons
B. electrons
C. neutrons
D. both a and c

In which type of bond do atoms share a pair of electrons?
A. covalent
B. ionic
C. hydrogen
D. radioactive

How many covalent bonds can carbon form?
A. 4
B. 3
C. 1
D. 2

An acid releases an ion of
A. nitrogen
B. oxygen
C. potassium
D. hydrogen

A DNA molecule is composed of
A. alkenes
B. phosphate-sugar backbones
C. amino acids
D. fatty acids

Adenine on one strand on a DNA molecule will attach to what base on the opposite DNA strand?
A. cytosine
B. uracil
C. guanine
D. thymine

Which base will an RNA molecule have but not a DNA molecule?
A. cytosine
B. guanine
C. uracil
D. thymine

What molecule attaches to both the phosphate group and the fatty acids in a phospholipid?
A. amino acid
B. glycerol
C. sugar-phosphate backbone
D. glycogen

ATP serves as
A. a unit of chemical energy
B. a toxic byproduct of metabolism
C. the genetic material of the cell
D. a catalyst

A chemical group that removes hydrogen ions from a water solution is referred to as a(n)
A. base
B. enzyme
C. acid
D. catalyst

An amino acid has which as part of its structure?
A. an amino group
B. a phosphate group
C. glycerol
D. all of the above

Which term refers to a group of cells acting together to perform a certain function?
A. tissue
B. atom
C. organism
D. organ system

Homeostasis refers to
A. a stable set of conditions
B. a disease state
C. a living thing that does not move
D. the ability to reproduce

The smallest chemical unit in the body is a(n)
A. organism
B. organ system
C. tissue
D. atom

Which atom forms the backbone of organic molecules?
A. oxygen
B. carbon
C. phosphate
D. nitrogen

Carbohydrates include
A. fats
B. sugars
C. enzymes
D. DNA

Lipids include
A. enzymes
B. fats
C. DNA
D. sugars

Proteins include
A. fats
B. sugars
C. DNA
D. enzymes

RNA is composed of how many strands?
A. 4
B. 3
C. 2
D. 1

Which value on the pH scale has the highest acid concentration?
A. 4
B. 2
C. 6
D. 8

What does an unsaturated fatty acid have in it that a saturated fat does not?
A. a double bond between carbons
B. an acid group
C. hydrogen
D. carbon

Which is healthier in the diet?
A. trans fatty acids
B. both have the same health value
C. cis fatty acids

A disaccharide has

A. one sugar
B. DNA
C. two acid groups
D. two sugars

An example of a polysaccharide is
A. DNA
B. starch
C. maltose
D. glucose

Proteins are composed of
A. phosphate-sugar backbones
B. amino acids
C. fatty acids
D. sugars

Enzymes
A. speed up chemical reactions
B. give off hydrogen ions
C. take up hydrogen ions out of solution
D. all of the above