In base excision repair, a whole segment of DNA is removed and resynthesized
A. true
B. false
B
You might also like to view...
You've likely heard of polar bears (Ursus maritimus) and grizzly bears (Ursus arctos horribilis). Have you hear of a grolar bear or a pizzly bear? These might be unfamiliar because they are the offspring of matings between polar bears and grizzlies
A handful of these animals have been born in zoos; three have been documented in nature. Due to their rarity, only a few grolars (grizzly dad and polar bear mom) or pizzlys (polar bear dad and grizzly mom) have been studied in detail. Their fur color, head shape, and ear shape are striking intermediates between the phenotypes of their parents. It is thought that polar bears originated from a population of brown bears (Ursus arctos) that became geographically isolated during a glaciation event that occurred about 150,000 years ago (Lindqvist et al., 2010). Traditionally the territories of grizzly bears and polar bears did not overlap, as grizzlies ranged from Alaska to Mexico, whereas polar bears stayed on the annual sea ice over the Arctic continental shelf and within the Arctic archipelagos. Relatively recently (last 50 years or so) grizzlies and polar bears have begun to come in contact in the wild. References: Lindqvist, Charlotte; Schuster, Stephan C.; Sun, Yazhou; Talbot, Sandra L.; Qi, Ji; Ratan, Aakrosh; Tomsho, Lynn P.; Kasson, Lindsay et al. (2010). Complete mitochondrial genome of a Pleistocene jawbone unveils the origin of polar bear. PNAS 107 (11): 5053-5057. doi:10.1073/pnas.0914266107. PMC 2814953. PMID 20194737. The origin of polar bears was the result of A. allopatric speciation. B. sympatric speciation. C. peripatric speciation.
Choose the evidence supporting the argument that a small number of changes in developmental regulatory genes can result in large phenotypic changes.(choose all that apply)
_____ Closely related animals can have very different patterns of development. _____ Most developmental genes are highly conserved. _____ Much of phenotypic variation is environmentally caused. _____ The developmental "toolkit" consists of a large number of genes. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about developmental regulatory genes? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The terminal electron acceptor in respiration may be
A. oxygen. B. nitrate. C. NAD. D. an inorganic molecule. E. oxygen, nitrate, AND an inorganic molecule.
To which of the following books does DNA
compare?
a. a novel b. a mathematics textbook c. a cookbook d. a travel guide e. a biography