Exam 1
Exam 2
Exam 3
Jitt Questions
Definitions
100
Where do the terms “five prime” and “three prime” used in discussing nucleic acids come from?
The numbered carbons of a ribose or deoxyribose sugar in a nucleotide
100
Anticodons are made up of how many bases
3
100
A change in the original DNA genetic code is termed a
Mutation
100
Enzymes catalyze reactions such that they occur a million-trillion times faster than an uncatalyzed reaction.
True
100
the process of making a copy of DNA , is know as what
DNA replication
200
A biologist isolates a large, unidentified molecule from some cells in her lab. She determines that an enzyme is able to break the macromolecule into smaller pieces, but only when water is present. What reaction does the enzyme catalyze?
Hydrolysis
200
What type of interaction occurs between the codon and anticodon during translation?
Hydrogen bonds
200
Cystic fibrosis is a recessive disorder, meaning that individuals only need one copy of the allele that encodes a functional version of the CFTR protein; in other words, individuals that are unaffected are either homozygous or heterozygous for the allele that encodes functional CFTR protein. Which of the drawings below best represents an individual that does NOT have cystic fibrosis?
B
200
How many copies of the RPE65 gene do unaffected individuals have?
Two
200
Makes lipids and has no ribosomes
Smooth ER
300
The polymer below is made up of what?
Nucleotides
300
At which place (or places) can a new monomer be added to the biomolecule below?
D
300
Which fragment represents the leading strand?
D
300
Osmosis involves the diffusion of ______ across a selectively permeable membrane.
Water
300
small membrane sacs that specialize in moving products into, out of, and within a cell
Vesicles
400
Why do phospholipids spontaneously form bilayer when mixed with water?
Phospholipids have one end that is polar and another that is non-polar
400
Is this statement true or false?
RNA is synthesized 3' to 5', meaning that the 3' end of each new nucleotide is added to the 5' end of the existing RNA strand.
False
400
Which is the correct order of events in cell division?
- The nuclear envelope dissolves
- Division of the cytoplasm
- Chromosomes condense
- Sister chromatids separate
3,1,4,2
400
Mutations in RPE65 that cause LCA2 result in
a partial or total loss of RPE65 protein function.
400
Phase of mitosis in which the chromosomes separate and move to opposite ends of the cell
Anaphase
500
A biologist isolates an enzyme from some cells in her lab. She determines that this enzyme is able to polymerize small organic molecules, producing water as a byproduct. What reaction does the enzyme catalyze?
Dehydration synthesis
500
A new species of bacteria has been discovered in the hot springs of Yellowstone National Park (an extremely hot environment). One theory for how some organisms can tolerate high temperatures is that they have a greater amount of hydrogen bonding in their DNA than normal. If this were theory were true, what might you expect if you were to sequence the DNA of this new species of bacteria?
A greater amount of guanine and cytosine nucleotides than adenine and thymine nucleotides
500
A mutation that does NOT alter the protein produced is called a ___________ mutation.
Silent
500
Secreted proteins are synthesized on ribosomes associated with the ___________.
Rough endoplasmic reticulum
500
changes a normal codon into a stop codon
nonsense mutation