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Sperm cells bind to an egg via ZP3, a glycoprotein in the glycocalyx of the egg, and can be inhibited from doing so by adding an excess of free oligosaccharide. You are interested in finding the protein on the sperm cell responsible for binding to ZP3. Which of the following is it most likely to resemble?
a. spectrinb. A porinc. bacteriorhodopsind. A proteoglycane. A lectin
Discuss three adaptations for terrestrial life that occurred during the evolution of green plants. For each adaptation, note the taxonomic group in which the trait first appeared
Describe the substrates/products that link the light reactions of photosynthesis to the Calvin cycle.
You have two flies that have the following traits. The female fly is dominant homozygous for red eyes and she has a rate immune deficiency for which she is recessive homozygous, having one allele on each X-chromosome.
In a cell containing two chromosome pairs, what would the number of chromosomes be in each of the daughter cells following meiosis in the event of an error in division in which the sister chromatids of one chromosome did not separate during meiosi..
In garden peas, grey seed coat color is dominant to white seed coat color. In the following cross, the phenotypes of the parents and offspring are known, but the genotypes are unknown.
The DNA molecule is made up of two strands each of which is a sequence of sugar and phosphate molecules linked by covalent bonds.
the scenario: Zoologists monitoring the wild Siberian tiger population have determined the current number of while-furred tigers to be 5% of the remaining 1,500 Siberian tigers.
A 3-factor cross in Salmonella typhimurium was performed using bacteriopage P22. The cross between an arg-leu-his- recipient bacterium and bacteriophage P22,
In squash, disc shaped fruit is dependent on dominant gene D and elongated fruit on recessive allele d. Yellow color is controlled by dominant gene R and green color by recessive allele r. Draw a cross between the homozygous squash fruits and summ..
A 100 ml culture bottle is filled with LB (Lysogeny broth) which has all the nutrients and plenty of oxygen to support of oxygen to support E. coli growth. By performing serial dilutions and plate count you estimated that there are 5x10^5 cells pe..
In insulin mRNA, the protein coding sequence has 318 nucleotides. How many amino acids would be translated from this sequence? How many amino acids would be in the C peptide?
Selective pressure is often thought to occur within the coding region of a gene but when the sum of Ka/Ks for each position is calculated, no positive selection is shown. Why is this? Can you think of a way to show positive selection in such a gen..
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