Biology 1
Waxes create a waterproof layer on the outside of some living organisms. To which group of organic molecules do waxes belong?
lipids
Which transgenic organism has been used to clean up oil spills?
bacteria
During which phase of the cell cycle does most cell growth occur?
interphase
Why must DNA replication have to occur before a cell can divide by mitosis?
to maintain the same number of chromosomes in the daughter cells as in the parent cell
Which adaptation do ferns, gymnosperms, and angiosperms have that mosses do not have?
vascular tissue
Plant cells are able to produce their own food. This process happens in which structure?
chloroplast
An insecticide kills most of the ants on a plant. Over time, it is determined that the insecticide is not as effective for killing ants. Which statement best explains this observation?
The ants killed by the insecticide and the surviving ants were genetically different.
Which is a primary function of a vacuole in a cell?
storage
A section of DNA has these bases: TAG CAG TAC
Which mRNA sequence is produced from this DNA section?
AUC GUC AUG
Which will most likely result in a negative growth rate in the human population of a country?
The death rate is higher than the birth rate.
What activity most contributes to the depletion of the ozone layer?
release of CFCs
Multicellular eukaryotic autotrophs belong to which kingdom?
Plantae
What determines the function of a specialized cell?
the active genes in the cell
Which process can occur in both mitosis and meiosis?
gene mutation
During translation, what does the tRNA deliver to the ribosomes?
amino acids
What carries the instructions for making amino acids in a protein?
the sequence of nitrogen bases on the mRNA
Salivary amylase is an enzyme in humans that breaks down starches. What substance would humans have difficulty digesting without this enzyme?
carbohydrates
In nature, which type of behavior causes animals to produce aggressive displays and sounds?
territoriality
How do some chemicals increase the risk of a person getting cancer?
by causing cell mutations
Having freckles is dominant over not having freckles. If two individuals heterozygous for freckles have a child, what is the probability the child will have freckles?
75%
How are mitosis and meiosis similar?
both require DNA replication
What do both prokaryotic and eukaryotic cells contain?
cytoplasm
What will most likely occur if the population of the world continues to increase at predicted rates?
There will be more rapid depletion of natural resources.
What is the difference between the DNA of a dog and the DNA of a fly?
the sequence of nucleotides
What is the function of a restriction enzyme?
to cut DNA at a specific nucleotide sequence