Which of the following best describes the overall scheme of typical plant development?
a. Growing tips and zones are present throughout a plant's life, and final plant form is not influenced by the environment.
b. Growing tips and zones are present throughout a plant's life, and plant bodies do not have a fixed final size.
c. Plant bodies do not have a fixed final size, and final plant form is not influenced by the environment.
d. Plant bodies have a fixed fi
Ans: b. Growing tips and zones are present throughout a plant's life, and plant bodies do not have a fixed final size.
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Mutated versions of one or both of the genes BRCA1 and BRCA2 are associated with an increased risk of ________
a. breast cancer only b. lung cancer and pancreatic cancer c. both breast cancer and ovarian cancer d. lymphoma only
Which of the following statements is true?
a. Chromosomes are classified into two categories, the sex chromosomes that determine gender and autosomes that determine non-gender related traits. b. Homologous chromosomes differ in banding patterns, the traits they code for and size. c. While sex chromosomes determine different genders they look the same until they are stained. d. In humans all 46 chromosomes have an identical match called the homologue.
The advantage of homologous recombination is that ________.
A. following a splice with Cas9, the ends are joined back together with the induction of a frameshift mutation resulting in an inactive protein B. following a splice with a restriction enzyme, the sticky ends can be combined with a piece of donor DNA that has the same sticky ends C. genes from two different sources can be joined together when the wild-types contain homology between the two molecules, allowing DNA ligase to join the naturally-occurring sticky ends D. following a splice with Cas9, the ends of the chromosome can be seamlessly joined with a piece of donor DNA that has been engineering to contain flanking sequences homologous to the broken chromosome ends
During replication, which enzyme unwinds the DNA double helix?
A. DNA polymerase I B. DNA helicase C. DNA primase D. DNA ligase E. DNA gyrase