List at least three differences in how the E. coli and human genomes are arranged
What will be an ideal response?
ANSWER: The E. coli genome consists of one circular chromosome, whereas the human genome is
composed of many linear chromosomes. The human genome contains many more nucleotides
and protein-coding genes than the genome of E. coli. Despite that, only about 1.2% of the
human genome is coding, whereas nearly 90% of the E. coli genome is coding. Finally, each
human gene contains eight introns on average, but E. coli genes do not contain introns at all.
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Without data from the base composition studies of Chargaff, what might Watson and Crickâs modeling studies have erroneously concluded?
A. Bases could pair with themselves (e.g. A with A, C with C). B. Any purine could pair with any purine. C. Any pyrimidine could pair with any pyrimidine. D. Any purine could pair with any purine and any pyrimidine could pair with any pyrimidine. E. Any purine could pair with any pyrimidine.
In spermatogenesis, what cells form in meiosis II?
A. Primary spermatocytes B. Secondary spermatocytes C. Spermatids D. Mature sperm E. More than one of these
When a disease is said to have a multifactorial basis, it means that
A) many factors, both genetic and environmental, contribute to the disease. B) it is caused by a gene with a large number of alleles. C) it affects a large number of people. D) it has many different symptoms. E) it tends to skip a generation.
Harmful substances are detoxified within the cell by the ________
Fill in the blank(s) with correct word