WorksheetsExam 3 Bio 150 Review
Total questions: 52
Worksheet time: 28mins
Which is NOT an essential element of communication?
signaling cell
signaling molecule
chloroplasts
receptor protein
What is a paracrine signal?
cells are near each other, signal travels short distance
neurotransmitter signals between cells
hormone signals between cells
all of the above
Insulin traveling through the blood is an example of endocrine signaling
true
false
What signal type binds to the same cell?
direct
endocrine
autocrine
paracrine
Is The nightmare before Christmas a Halloween or Christmas movie?
Christmas
Halloween
Response must be terminated for a new signal to be received and for a response to be over
true
false
How does a ligand-gated channel work?
signal binds to receptor, gate will open or close
signal binds to gate, gate will open or close
signal binds to bilayer, gate will open or close
enzymatic receptors involve signals binding to receptors, but phosphate groups also attach to make the receptor active
true
false
What receptors are commonly used for signaling gene expression?
Cell surface receptors
G-protein-coupled receptors
intracellular receptors
Can signals have different effects on different receptors?
yes
no
Pizza for breakfast??
yes plz
mmmmm no
Prokaryotes use the cell cycle to replicate DNA
true
false
At what phase does the spindle apparatus attach to the chromosomes in the cell cycle?
prophase
metaphase
prometaphase
anaphase
What is the end result of Mitosis and cytokinesis?
2 divided nuclei with different DNA
2 nuclei undivided with identical DNA
2 nuclei divided with identical DNA
2 nuclei undivided with different DNA
Cancer is a consequence of uncontrolled cell division
true
false
Cell division only moves to the next step when the cell is ready
true
false
Which superpower is the best?
flying
telekinesis
read minds
Where is the DNA replication checkpoint?
before anaphase
before entering S phase
at the end of G2
Oncogenes start as normal genes but get mutated
true
false
Inactivity of a tumor suppressor gene leads to increase cell division
true
false
Can p53 stop cancerous genes if mutated?
yes
no
Which of the following can activate a protein by transferring a phosphate group to it?
cAMP
G proteins
phosphodiesterase
protein kinase
Which of the following is NOT a response by the cell from a signal transduction pathway?
cell growth
gene expression
secretion of molecules
all of the above are responses
What is an example of genome sequencing?
shotgun sequencing
nucleotide sequencing
protein sequencing
RNA sequencing
How are the types of sequences present in a genome identified?
genome sequencing
genome annotation
genome highlighting
A sequence motif is a telltale sequence of nucleotides that indicate the function encoded in a particular region.
true
false
(a) are discovered by comparing mRNA sequences with DNA sequences. (lowercase only)
Genome annotation can be used to create vaccines
true
false
Genome size is a good predictor of biological complexity.
true
false
Are eukaryotes or prokaryotes polyploidy?
eukaryotes
prokaryotes
both
neither
What kind of chromosome is packaged into loops from a circular chromosome
bacterial
animal
What has its own DNA?
mitochondria
chloroplasts
neither
both
What is DNA separated by in gel electrophoresis?
charge
size
solubility
What cuts DNA in very specific locations and is a palindrome?
Restriction enzymes
gel electrophoresis
PCR
Somatic cells pass mutations from parent to offspring.
true
false
Most mutations are (a) .(lowercase)
What mutation substitutes a nucleotide that with another, but doesn't change the amino acid?
missense
nonsense
silent
What kind of mutation is in Cystic Fibrosis?
deletion
insertion
silent
missense
Which is not a chromosomal level mutation?
deletion
duplication
inversion
silent
DNA fingerprinting is used commonly in crime scene investigation.
true
false
What can cause mutation?
environment
passed through cell division
both
neither
Are all mismatches fixed by proofreading?
yes
no
What DNA repair cuts out s segment of mismatched?
Base excision
nucleotide excision
post-replication mismatch repair
This type of chromosomal mutation produces an extra copy of all or part of the chromosome:
multiplication
replication
duplication
inversion
short distance
cell to cell
autocrine
short distance
cell to cell
autocrine
Which enzyme is responsible for unwinding the DNA double helix during replication?
DNA polymerase
Primase
Helicase
Ligase
What is the main function of the spindle fibers during mitosis?
To replicate DNA
To package chromosomes
To synthesize proteins
To separate chromosomes
Which of the following help(s) to hold the DNA strands apart while they are being replicated?
primase
double-strand binding proteins
single-strand binding proteins
DNA polymerase
What did the Meselson-Stahl Experiment show?
Conservative replication is used
Semi-Conservative replication is used
Cells do not replicate
Cells use both kinds of replication
