Under what environmental conditions do yeast carry out fermentation?
A. high osmotic pressure
B. low pH
C. high temperature
D. absence of oxygen
E. All of the choices are correct.
Answer: D
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What type of cellular junction cements cells together that use cadherins as a belt around each cell?
a. desmosomes b. gap junctions c. tight junctions d. plasmodesmata e. adhering junction
The process that leads to development haploid gamete is best described as ________
A) independent assortment B) replication C) dominance or recessiveness D) segregation E) Mendelian inheritance
The following mRNA transcript would result in which polypeptide sequence?5?-ACU UUC ACU AUG UUU UUA UCC UCC ACU CCU UGA-3?Use the following codons and the amino acids they encode.AUG = Start or Met; UUU, UUC = Phe; UUA, UUG = Leu; UCU, UCC = Ser; CCU, CCC = Pro; ACU, ACC = Thr; UGA = Stop.
A. Thr-Phe-Thr B. Met-Phe-Leu-Ser-Ser-Thr-Pro C. Thr-Phe-Thr-Phe-Leu-Ser-Ser-Thr-Pro D. Phe-Leu-Ser-Ser-Thr-Pro E. Met-Phe-Leu-Ser-Ser
Consider a chromosome with ordered loci A (A/a), B (B/b), C (C/c), D (D/d), and E (E/e) where the letters in the parentheses indicate the alleles at loci
On a chromosome in which A, C, D, and E are coupling, a new allele arises at the locus B. This new allele B, has a negative effect on fitness. As a result, we would expect: a. the genetic variation at neighboring loci to decrease. b. the alleles A, C, D, and E may be lost due to background selection. c. the alleles A, C, D, and E may be lost due to genetic hitchhiking. d. A and B. e. All of the above.