Which of the following statements concerning translation is correct?
The ribosome stops protein synthesis when it reaches a nonsense codon in the mRNA.
tRNAs enter the ribosome at the E site and leave from the A site.
All of the following are required for the generation of ATP by chemiosmosis EXCEPT
a) passage of electrons through electron carrier chains
b) conversion of pyruvic acid to lactic acid
c) use of proton flow by ATP synthase
d) active tr
The Scientific Method Lab
The purpose of this lab is to introduce you to the scientific method and some of the tools that
scientists use. There are several activities provided to help you understand the topic. You will
first want to read through the lab m
Human prenatal development takes _ weeks.
The postnatal period extends from
A. the fertilized egg until the end of life.
B. fertilization to birth.
C. birth to death.
D. the beginning of the fetal period until
During the first meiotic division
A. sperm and egg form.
B. homologous chromosome pairs separate.
C. homologous chromosome pairs join.
D. the cell becomes diploid.
Meiosis is necessary because
A. otherwise the fertilized ovum will ha
The human genome consists of
A. DNA, most of which encodes protein.
B. DNA, most of which does not encode protein.
C. protein, most of which encodes DNA.
D. protein, most of which does not encode DNA.
A gene is
A. a DNA sequence that
Which of the following is not a function of the kidneys?
A. Maintaining volume, pH, and composition of body fluids within normal ranges
B. Removal of excess chemicals
C. Removal of metabolic wastes
D. Synthesis of plasma proteins
After eating, _ signals the hypothalamus to suppress appetite.
B. neuropeptide Y
Sarah eats only dairy, and no meat or eggs. She is a(n)
The alimentary canal extends, in its entirety, from
A. the mouth to the large intestine.
B. the stomach to the small intestine.
C. the liver to the gallbladder.
D. the mouth to the anus.
The digestive system
A. ingests food, propels
Water balance and electrolyte balance are interdependent because
A. water dissolves in electrolytes.
B. water and electrolytes are both in an ionic state in the blood.
C. both form ions in blood.
D. electrolytes are dissolved in water.
B. making ATP.
C. the entire process of gas exchange between the atmosphere and cells.
D. circulating blood to tissues.
The events of respiration are
A. inhaling and exhaling.
B. ventilation, external and
Receptors for the general senses are found
A. in a few clusters.
B. only in the integumentary system.
C. widely distributed throughout the body.
D. throughout the visceral organs.
Receptors for the special senses are found
Disease-causing agents are called
Fluid is kept from accumulating in tissue spaces by
C. the urinary system.
D. the lymphatic system.
The structure of a ly
A hormone is a _ and the target cell is _.
A. protein that stimulates other cells; the source of hormone secretions
B. regulatory molecule that controls secretions of other cells; a cell that synthesizes hormones
C. molecule that has a
The heart pumps about _ liters of blood a day and contracts about _ times in a lifetime.
A. 1,000 liters; 1 billion
B. 1,200 liters; 2 billion
C. 3,000 liters; 2 billion
D. 7,000 liters; 2.5 billion
Circulation is vital because it
The percentage of red blood cells in a sample of human blood is normally about
A. the percent of red blood cells in a blood sample.
B. a disease.
C. a clotting factor.
D. the color of pla
The central nervous system (CNS) consists of
A. spinal and cranial nerves.
B. the brain and spinal cord.
C. the cerebrum and cerebellum.
D. nerves in the upper and lower limbs.
The epidural space contains
A. loose connective tissue,
The cytoplasmic extensions that, together with the cell body, provide the main receptive surfaces for
B. chromatophilic substance (Nissl bodies).
The two types of cells of the nerv
Functions of muscles include
B. muscle tone.
C. moving bones.
D. all of the above.
The outermost layer of connective tissue surrounding a skeletal muscle is the
A. bind bones.
B. allow bones to grow.
C. enable body parts to move.
D. all of the above.
Joints are also called
Classifying joints as synarthrotic, amphia
Which of the following is not one of the four basic types of body tissues?
A. Epithelial tissue
B. Connective tissue
C. Eye tissue
D. Muscle tissue
Which of the following characteristics is used to name tissue types?
A. Location of c
The term "bone" can refer to
A. a tissue, an organ or a type of cell.
B. a tissue or an organ only.
C. a tissue only
D. an organ only.
All of the following are functions of bones except
A. to protect certain internal organs.
B. to pr
Chemistry deals with
A. the composition and changes of substances that make up living as well as non-living matter.
B. the composition and changes of substances found in organisms only.
C. the composition of and changes of substances th
An organ consists of
A. skin and bones.
B. two or more tissues grouped together that function together.
C. at least four tissues grouped together that function together.
D. one variety of each of the four tissue types.
The human inte
"Metabolism" refers to
A. the reactions in the body that synthesize proteins and nucleic acids.
B. the reactions in the body that break down proteins and nucleic acids.
C. all of the chemical reactions in a cell.
D. the breakdown of glu
About how many cells comprise the body of an adult?
A. 50 to 100 million
B. 50 to 100 billion
C. 50 to 100 trillion
D. 50 to 100 quadrillion
The three major parts of a cell are
A. the endoplasmic reticulum, Golgi apparatus, and vesic
Most of the terminology to name and describe body parts and their functions comes from
A. Latin and Greek.
B. English and Italian.
C. picture drawings on the cave walls of our ancestors.
D. the language of hunter-gatherers.