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30 Cards in this Set

  • Front
  • Back
Which of the following are of the smallest size?

A. Viruses
B. Bacteria
C. Fungi
D. Protistans
E. Plants
A
All but which one of the following are characteristics of at least some of the bacteria?

A. Photosynthesis
B. Heterotrophy
C. Chemosynthesis
D. Multicellularity
D
In bacteria, DNA is found __________.

A. in the nucleus alone
B. in organelles alone
C. in both the nucleus and organelles
D. attached to the cell membrane as a single circular thread
E. as particles scattered throughout the entire bacterial cell
D
Spherical bacteria are called__________.

A. bacilli
B. spirilla
C. cocci
D. bacteriophages
E. all of these
C
Gram-positive bacteria react to which of the following, whereas Gram-negative bacteria do not?

A. Presence of oxygen
B. Presence of a chemical stain
C. Presence of light
D. Absence of carbohydrates
E. Presence of magnetic fields
B
Small circular molecules of DNA in bacteria are called__________.

A. plasmids
B. desmids
C. pili
D. F particles
E. transferins
A
A virus is characterized by all but which one of the following?

A. Enzymes of respiration
B. Nucleic acid core
C. Noncellular organization
D. Protein coat
A
The bacterium E. coli______________.

A. is a normal inhabitant of the human intestinal tract
B. produces conditions that prevent invasion by other bacteria
C. enhances digestion, especially of fats
D. produces vitamin K
E. All of these
E
Most scientists do not consider viruses to be "alive" because_________-.

A. they have no genes
B. their metabolic machinery is borrowed from the host cell
C. they are unable to reproduce
D. no definite structural features are seen under the microscope
E. All of these
B
When a virus takes over the machinery of a cell, it forces the cell to manufacture______________.

A. more mitochondria for energy for the virus
B. more liposomes to isolate themselves from water
C. more food particles
D. more viral particles
E. more Golgi bodies so that the cell will secrete the excess viruses
D
In order for DNA molecules to undergo recombination______________.

A. they must be from the same species
B. their strands must separate as in replication
C. they must be cut and spliced at specific nucleotide sequences
D. they undergo lysis
E. they must be identical
C
Enzymes used to cut genes in recombinant DNA research are____________.

A. ligases
B. restriction enzymes
C. transcrriptases
D. DNA poymerases
E. replicases
B
Which of the following methods of DNA amplification does NOT require cloning?

A. Reverse transcription
B. Polymerase chain reaction
C. Cloned DNA
D. Reverse transcription and polymerase chain reaction
E. Polymerase chain reaction and cloned DNA
E
The human genome project seeks to___________.

A. identify the nucleotide sequence of all human genes
B. develop a complete DNA library for a human gene
C. develop genetic markers for all genetic diseases
D. catalog all the varieties of human alleles
E. identify all humans that possess genetic defects
A
Gene therapy___________.

A. has not yet been used successfully with mammals
B. is a surgical technique that separates chromosomes that have failed to segregate properly during meiosis II
C. has been used successfully to treat victims of Huntington's disorder by removing the dominant damaging autosomal allele and replacing it with a harmless one
D. replaces defective alleles with normal ones
E. All of these
D
Structural and chemical bridges connect groups, or layers of similar cells. These cells are united in structure and function and are called

A. organs
B. organ systems
C. tissues
D. cell layers
C
Which of the following tissues is found lining all internal surfaces?

A. Epithelium
B. Loose connective tissue
C. Adipose
D. Supportive connective
A
_____________ epithelial cells are modified for filtration and diffusion.

A. Cuboidal
B. Simple squamous
C. Simple columnar
D. Stratified squamous
B
The basement membrane

A. overlies the epithelium at its free surface
B. is composed partially of epithelial cells and partially of connective tissue
C. is mostly lipid and embedded celluloid fibers
D. lies between the epithelium and connective tissue
D
Blood is an example of which of the following types of tissue?

A. Epithelial
B. Muscular
C. Connective
D. Adipose
C
Skeletal joints and bones are linked together by

A. ligaments
B. tendons
C. cartilage
D. intercellular junctions
A
In which of the following locations in the body would you NOT find cartilage?

A. In the nose
B. In the external ear
C. In the embryonic skeleton
D. In the heart
D
Adipose tissue cells are filled with

A. cartilage
B. fat
C. jello
D. fibers
B
Which of the following tissues are characterized by being striated, having specialized junctions that fuse the plasma membranes of adjoining cells and communicating with each other resulting in the cells contracting as a unit?

A. Smooth muscle
B. Dense fibrous connective tissue
C. Supportive connective tissue
D. Cardiac muscle
D
The fastest communication throughout the body is accomplished by

A. neuron impulse transmission
B. blood flow
C. hormone diffusion
D. muscle contraction
A
The thoracic cavity is that part of the body which

A. houses your reproductive organs and bladder
B. essentially is the chest cavity and is separated from the abdomen by the diaphragm
C. houses the central nervous system
D. holds your stomach, liver and other organs
B
Homeostasis requires the interaction of sensors and effectors. Which of the following organs would be classified as an "integrator" of incoming and outgoing messages?

A. The brain and spinal cord
B. Muscles and glands
C. Sensory cells in the eye tongue and ear
D. Many of the bones of the body
A
In the nervous system, which of the following is most directly associated with a stimulus?

A. Integrators
B. Effectors
C. Receptors
D. The central nervous system
C
The correct sequence of perceiving and responding to the environment would be

A. stimulus - receptor - integrator - response - effector
B. stimulus - response - integrator - receptor - effector
C. stimulus - receptor - integrator - effector - response
D. stimulus - effector - integrator - receptor - response
C
Which system in the body is responsible for defending the body against infection and tissue damage, and returning some tissue fluid to the bloodstream?

A. Respiratory
B. Urinary
C. Lymphatic
D. Circulatory
C