Cells
Most cell membranes are composed principally of
Protein and lipids
Cells of the immune system are able to respond to the presence of invading organisms because they recognize the
antigens present on the invaders
Which structure is correctly paired with its function?
testis — development of sperm
In genetic engineering, the transfer of hereditary information from one species to another results in the formation of
recombinant DNA
Mutations are changes in
nucleic acids
Which structure is usually present only in animal cells?
centriole
In some people, substances such as peanuts, eggs, and milk cause an immune response. This response to usually harmless substances is most similar to the
action of white blood cells when certain bacteria enter the body
Base your answer to the next 3 questions on the diagram below and on your knowledge of biology. The letters in the diagram indicate structures present in a human male.What change would occur immediately if both structures labeled B were damaged or blocked?
Gametes would no longer be transported to structure C.
The DNA of a human cell can be cut and rearranged by using
enzymes
Silent mutations can have a neutral effect because
they code for the same amino acid
Which of the following correctly matches an organelle with its function?
central vacuole . . . storage
Which disease damages the human immune system, leaving the body open to certain infectious agents?
AIDS
Which structure produces the male hormone responsible for characteristics such as muscle development, deep voice, and gamete production?
E
The technique illustrated in the diagram is known as
Genetic engineering
A mutation occurring in a human can be passed from parent to offspring when it occurs in a
gamete formed in the ovary
Which sequence of terms is in the correct order from simplest to most complex?
1- cells → tissues → organs → organ systems s
A dead or weakened pathogen used to establish immunity would most likely be found in
a vaccine
Meiosis occurs in
E
Enzymes are used in moving sections of DNA that code for insulin from the pancreas cells of humans into a certain type of bacterial cell. What will this bacterial cell's offspring be able to produce?
human insulin
Which event would most likely cause a change in a mutation in an organism?
exposure to radiation
Which statement illustrates an exception to the concept that the cell is the unit of structure and function of all living things?
Viruses contain genetic information but lack other cellular components.
A student infected by a common cold virus ran a low-grade fever. After a few days, the student's temperature returned to normal and the student was free of cold symptoms. The fever served as
an immune response to a pathogen
Structure B usually produces
estrogen, progesterone, and eggs
Scientists have found a gene in the DNA of a certain plant that could be the key to increasing the amount of lycopene, a cancer-fighting substance, in tomatoes. The process of inserting this gene into the DNA of a tomato plant is known as
genetic engineering
The diagram below represents one process that might occur in cells.Which process is represented in the diagram?
Mutation