A asset tube contains red blood cells and a salt solution. When the tube is held up to a page, you cannot see the print. with reference to a concentration of 0.9% sodium chloride (NaCL), how concentrated is the salt solution?
What will be an ideal response?
Answer: The solution has a lower concentration than .9% NaCl. It is hypotonic and the cells have burst.
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Certain proteins can bind to specific DNA regulatory sequences by entering
A. DNA's minor groove by using DNA polymerase and reading the nucleotide base pairs. B. the major groove of the DNA and reading the nucleotide base pairs. C. the major groove of RNA and reading the nucleotide base pairs. D. the minor groove of the DNA and reading the nucleotide base pairs. E. DNA's major groove by using DNA polymerase and reading the nucleotide base pairs.
Which statement about complementary base pairing is not true?
a. Complementary base pairing plays a role in DNA replication. b. In DNA, T pairs with A. c. Purines pair with purines, and pyrimidines pair with pyrimidines. d. In DNA, C pairs with G. e. The base pairs are of equal length.
What structure is most important in forming the tetrads?
a. centromere b. synaptonemal complex c. chiasma d. kinetochore
Which statement does not describe helminthic parasites?
A) All tend to have complex life cycles that can involve different host species. B) All belong to one of two groups: roundworms or flatworms. C) An important mode of transmission is ingestion of the eggs or organism from feces-contaminated food and water. D) All are hermaphroditic. E) All reproduce sexually.