Organs are composed of tissues, which are composed of cells. This is an example of which characteristic of life?
Living things have levels of hierarchical organization
Which sequence correctly lists the different levels of biological organization?
A fossil was once a living organism but its tissues have now been replaced by minerals and it no longer exhibits most properties of life, except for:
Outside, the non-living world is unorganized and chaotic while inside the cell or organism there is a relatively constant environment; maintaining this environment is a process of:
A kernel of corn contains an embryo plant that is capable of becoming a complex plant with roots, stalks, leaves and ears of corn. This potential reflects which property of life?
growth & development
Which of the following is the correct order of levels of organization from small to large?
To measure the activity of the human brain during certain thought processes, a short-lived radioactive sugar is injected in the carotid artery and is utilized by those cells that are most active. This shows up on a PET scan and demonstrates the detection of:
You can hold a water droplet between two fingertips held slightly apart. This is an example of what property of water?
cohesion of water molecules from hydrogen bonding
The water strider is an insect that skates across the water without sinking. The tips of its feet should be coated with molecules that are:
If he pH of the saliva is slightly basic. Which of the following would therefore be an expected pH for saliva?
Which is NOT a correct association of organic molecules?
fatty acids full of hydrogens are an unsaturated
A genetic mutation can cause a change in the sequence of the 20 amino acids used to build proteins. Such a
change is a change to the protein's structure:
primary structure but will alter 2nd and 3rd
The _____ structure of a protein consists of the sequence of the amino acids joined by polypeptide bonds.
The proposed cause of mad-cow disease, scrapie in sheep, and kuru in cannibals from the New Guinea highlands is a change in a brain protein. Disease victims appear to have a normal protein that should contain primarily coiled alpha helix changed conformation into a protein mainly made of pleated beta sheets. This is a change in the:
The final shape of a protein is very important to its function. When proteins undergo an irreversible change in shape called ________________ they ________________ perform their usual functions.
Molecules such as glycogen and cellulose that are formed from long chains of individual sugar molecules are
DNA is considered this type of compound.
a. lipid, b. protein, c.carbohydrate
=d. no correct response
Hemoglobin is a complex protein having a primary, secondary, tertiary, and quaternary structure.
Molecules such as glycogen and cellulose that are formed from long chains of individual sugar molecules are:
If one strand of DNA has the base sequence TATAGCGC, its complementary strand will have the sequence:
If one strand of a DNA molecule has the base sequence TATAGCGC, its mRNA will have the sequence:
The process of obtaining a copy of the information in a gene as a strand of RNA is called:
The process of taking the information on a strand of messenger RNA and building an amino acid chain that will become all or part of a protein molecule is called:
Erwin Chargaff, Rosalind Franklin, Francis Crick, and James Watson all worked on pieces of information relating to:
the structure of DNA.
Regarding the duplication of DNA, we now know that each double helix:
splits down the middle into two single helices, and each one then acts as a template to build its complement.
Information from X-ray crystallographic data collected by _______ was used by Watson and Crick in their development of the model of DNA.
The X-ray diffraction photography of Rosalind Franklin was critical evidence:
Indicating that DNA has a double helix structure.