How can breastfeeding help a baby avoid infections?
What will be an ideal response?
Antibodies have a stem structure that tags them for secretion outside the bloodstream into tears, saliva, sweat, and milk. If the mother has recently experienced and infection, most likely the baby will have been exposed as well, and the mother's antibodies will cross into the milk and protect the child.
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You suspect a region of DNA contains a promoter and wish to confirm that a sequence of interest binds proteins. Which experiment would you use?
A) in situ hybridization B) band shift assay C) pulse-chase assay D) Southern blotting E) northern blotting
Point mutations
A. are due to a change in one DNA nucleotide B. may change a specific codon C. can cause a genetic disease such as sickle cell disease that is due to a base change that codes for valine rather than glutamate D. all of the choices are correct
Assume that a dihybrid F2 ratio, resulting from epistasis, was 15:1. If a double heterozygote was crossed with the fully recessive type, what phenotypic ratio is expected among the offspring?
A) 1:3 B) 3:1 C) 5:7 D) 1:2 E) 1:1
If a modern novel life-form were made, what would this tell us about LUCA?
What will be an ideal response?