What makes phospholipids good at forming cellular membranes?
A. Regions of aliphatic and hydrophilic atoms causing an internalization of phosphorous making a bilayer.
B. The polar and non-polar regions create an amphipathic bilayer of phospholipids.
C. Covalent and ionic bonds between glycerols create a tight seal around the cell.
D. The three saturated fatty tails in phospholipids create a semi solid like structure that maintains a cell's shape.
B. The polar and non-polar regions create an amphipathic bilayer of phospholipids.
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In the DNA sequence recognized by EcoRI,
where is the cut made?
a. after the G b. between the two As c. between the two Ts d. after the second T e. after the C
Why is it essential that meiosis produce haploid cells?
A. so that the number of chromosomes will double each generation B. to produce haploid offspring C. to prevent the number of chromosomes from doubling each generation D. to produce diploid gametes E. to allow asexual reproduction
Small lakes and ponds usually lack a profundal zone
____________________ Indicate whether the statement is true or false.
Evolution occurs in
A. individuals. B. communities. C. species. D. genotypes. E. alleles.