A genetic mutation
A genetic mutation occurs that changes a cysteine residue in the alpha-keratin protein into a methionine. The resulting mutant keratin will be more stable that the original, wild-type keratin. True or False?
Entries by Daphne Hanson
Which statement is NOT true about prokaryotes?
Which statement is NOT true about prokaryotes? A.) Prokaryotes vary widely in shapes and sizes B.) Prokaryotes store their genetic information in a nucleus C.) Prokaryotes use DNA to store their genetic information D.) Prokaryotes are usually single-called but can be multicellular
Maintaining healthy pregnancy
Jennifer is a 25 year old woman who has just found out she is pregnant. Maintaining healthy pregnancy is necessary. Her doctor has estimated that she is about 8 weeks along. Jennifer is 5’5″ tall, and her pre-pregnancy weight was 170 lbs. Jennifer has a busy schedule and rarely gets a chance to shop for […]
The orders of Gammaproteobacteria
Make a dichotomous key to distinguish among the orders of Gammaproteobacteria
The use of a dilution factor
Which of the following correctly describes the use of a dilution factor of 0.01 for dilution of a bacteria culture?
What is the trait all lipids share?
What is the trait all lipids share? (72) Why are fatty acids considered nonpolar? (72) Why can saturated fatty acids pack tightly together forming solid fats? (73) Why do unsaturated fatty acids form liquid oils instead of solids?
The fatty acid tails of phospholipids
Which of these amino acids would interact with the fatty acid tails of phospholipids found in the middle of membranes? What amino acids would interact with the heads of phospholipids found on the surface of membranes?
X-linked recessive inheritance
There are five common features characterizing X-linked recessive inheritance, such as red-green color blindness. Which of the following statements about inheritance patterns of X-linked recessive traits in humans is FALSE? O Often, the transmission of the recessive allele from grandfather to daughter to grandson gives the appearance of generation skipping Matings of recessive males (cY) […]
Photosynthesis
Chloroplasts are found only in eukaryotic cells that carry out photosynthesis: plants and alg and algae appear green as a res chloroplast? (a)in the first, outer membrane (b)in the space between the first and second membranes (c)in the second, inner membrane (d in the third, innermost membrane ae. Plants ult of the presence of chlorophyll. […]
What are adaptations?
What are adaptations? What adaptations do you think will occur to the animals on the island?
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