Multiple Choice: The nucleotide sequence below represents a gene along the length of part of a chromosome. Below the DNA is a pool of tRNA’s with their attached amino acids: the three nucleotides represent the anticodon and the number above each anticodon symbolizes a particular amino acid attached to that tRNA. Using your knowledge of the steps involved in how genes code for proteins, determine which of the amino acid (number) sequences below would correspond with the expected polypeptide chain coded for by the gene:
| …A A T C G C A T G… Coding strand | |
| DNA sequence: | …T T A G C G T A C… Template strand |
Pool of tRNA's :
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| GCG | UAC | AAU | UCA | AUG | UUA | AAC | CGC |
A) 3-8-5
B) 6-1-2
C) 4-8-7
D) none of the above
Choose the FALSE statement:
A) If two individuals each carry a single copy of a gene coding for an autosomal recessive trait (Dd) were to marry, their offspring would have a 25% chance of expressing the recessive phenotype.
B) Alleles are the alternate forms of a gene; they first appear in the population as a result of mutations.
C) Hemophilia is a recessive sex-linked trait: If a man with this condition marries a normal woman whose father had hemophilia, all of their male children will have this condition, and all female children will be normal.
Choose the FALSE statement:
A) Catastrophism cannot account for the diversity of life seen on the earth today because many present-day organisms do not appear in the fossil record alongside ancient forms.
B) Lamarck’s proposed mechanism for evolution was based on the inheritance of features gained during an organism’s lifetime; according to this idea organisms could purposefully generate body forms needed to survive and could later pass these on to their offspring.
C) Both Darwin and Wallace were vigorous supporters of the theory known as “evolution by inheritance of acquired characteristics”.
In: Biology
How does Fluorouracil work, biologically
- What enzyme/protein does this drug bind to?
- What is the function of this enzyme/protein?
- Where is its active site?
- What is the substrate for the protein/enzyme?
- What is the Km and Vmax of this enzyme if this information is available?
In: Biology
What are Nucleic acids? Why are they important? What are some of the important functions of nucleic acids? Give a list of some important nucleic acids.
In: Chemistry
What is the difference between a fixed-time enzyme assay and a kinetic enzyme assay and what are the units of enzyme activity?
In: Chemistry
(Acetylcholine, Cholecystokinin, Gastric Inhibitory Peptide (GIP), Gastrin, Glucagon-Like Peptide 1, Histamine, Secretin, Somatostatin, chylomicrons, HDLs, LDLs, VLDLs, Cephalic, Gastric, Intestinal,)
a. ______________ are low density lipoproteins carrying more triglycerides than cholesterol.
b. ________, _________ and __________ are secreted into the bloodstream in response to amino acids in the digestive tract.
c. __________, __________ and __________ increase H+ secretion from parietal cells.
d. ______________ are the lowest density of lipoproteins taken up by lacteals.
e.________, ________ and __________ decrease H+ secretion from parietal cells.
f. _________ and _________ are hormones that stimulate insulin release from pancreatic Beta cells.
g. The ________ phase of digestion occurs from stimuli in the stomach while the ________ phase of stimulation can be started by simply seeing or smelling food.
h. Gastric motility and emptying is increased by __________ while it is slowed by __________, _________ and _________.
i. ______________ are lipoproteins used for removing excess cholesterol from the body.
j. Very low pH in the stomach stimulates _____________ to _________ (increase/decrease) gastrin release while higher pH than normal leads to a(n) ______ (increase/decrease) of gastrin secretion from G-cells.
k. The hormone ___________ stimulates pepsinogen secretion from the gastric mucosa while the hormone _________ stimulates pancreatic protease secretions like trypsinogen, and chymotrypsiongen.
l. ______________ are lipoproteins comprised of the largest amount of cholesterol and are considered ‘bad cholesterol’.
m. The hormone ___________ stimulates smooth muscle contractions of the stomach and small intestine.
n. Secretion of the hormone ___________ is stimulated by fatty acids and promotes secretion of pancreatic enzymes and gallbladder contractions.
In: Anatomy and Physiology
A film distribution manager calculates that 9% of the films released are flops. If the manager is right, what is the probability that the proportion of flops in a sample of 457 released films would differ from the population proportion by greater than 4% ? Round your answer to four decimal places.
In: Statistics and Probability
the kcat of an enzyme is 1875 sec ^-1, catalytic efficeny of same enzyme is 7.5*10^7, what is the km of enzyme?
In: Chemistry
Rubisco is
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the enzyme that fixes CO2 to RuBP |
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a slow enzyme |
||
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an enzyme that can catalyze two different reactions |
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All of the above |
In: Biology