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1. Which of the following statements about nuclear transport is true? a. mRNAs and proteins transit the nucleus through different types of nuclear pores. b. "Nuclear import receptors bind to proteins in the cytosol and bring the proteins to the nuclear pores, where the proteins are released from the nucleus." c. "Nuclear pores have water-filled pass through in a nonselective fashion." d. Nuclear pores are made up of many copies of a single protein. 2. Which of the following statements is true? a. "DNA molecules, like proteins, consist of a single, long polymeric chain that is assembles from small monomeric subunits." b. The polarity of a DNA strand results from the polarity of the nucleotide subunits. c. There are five different nucleotides that become incorporated into a DNA strand. d. Hydrogen bonds between each nucleotide hold individual DNA strands together. 3. What is the role of the nuclear localization sequence in a nuclear protein? a. It is bound by cytoplasmic proteins that direct the nuclear protein to the nuclear pore. b. It aids in protein unfolding so that the protein can thread through nuclear pores. c. It is a hydrophobic sequence that enables the protein to enter the nuclear membranes. d. It prevents the protein from diffusing out of the nucleus through nuclear pores. 4. How do changes in histone modifications lead to changes in chromatin structure? a. They directly lead to changes in the positions of the core histones. b. They change the affinity between the histone octamer and the DNA. c. They help recruit other proteins to the chromatin. d. They cause the histone N-terminal trails to become hyperextended.
Several main types of animals are now extinct. A treasure trove of fossils from these unusual animals was found in the Canadian Rockies.
What is the method used that would compute the amount of hydrogens in propane if you only knew the number of carbons.
One tank of gold fish is fed the normal quantity of food once a day, a second tank is fed twice a day, and a third tank four times a day during a six week study. The Fish's body fat is recorded. What is the standardizing variable.
Describe how you understand chemical and electrical gradients. Give examples from the body.
Find feathers to compare structures. Take a photo of the feathers, or draw a sketch, then write a 3-4 paragraph essay on why you think the feathers look the way they do.
Why is blue-white screening important to biotechnology? Please be as specific as possible. We did an experiment transforming E. coli with plasmid DNA.
A series of genetic crosses are planned to estimate whether genes for two characters are linked or unlinked. It is known from previous work that both characters exhibit a complete dominance inheritance pattern.
What are some examples of phenotypical characteristics that present two or more varieties and of phenotypical features that do not vary? In relation to the genes correspondent to those characteristics that vary among individuals what can be expect..
A train is travelling up a 3.73 degree incline at a speed of 3.25m/s as the last car breaks free. How far does last car travel before its speed momentarily reaches zero.
Discuss chromosomal condition results in an organism being only half as fertile as a wild type individual of the same species?
What is the function of the trp operon.
Fungi are the primary decomposers in ecosystems. If ecosystem lacked fungi, what impacts would that have on plant and animal nutrition?
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