In contrast with euchromatin, heterochromatin contains more genes and is earlier replicating
Indicate whether the statement is true or false
FALSE
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Bioremediation of uranium depends on metal-reducing bacteria to change the oxidation state of the uranium to form insoluble uranium compounds
Indicate whether the statement is true or false.
A phage that replicates inside the host cell and then lyses its host during its release is a
A. virulent or lytic phage. B. latent phage. C. lysogenic phage. D. dormant phage.
The purpose of a mordant in the Gram stain is
a. To make the flagella visible. b. To remove the simple stain. c. To make gram-negative cells visible. d. To make the bacterial cells larger. e. To prevent the crystal violet from leaving the cells.
Which of the following statements about the globin gene family is true?
(a) The globin protein, which can carry oxygen molecules throughout an organism's body, was first seen in ancient vertebrate species about 500 million years ago. (b) The gene duplication that led to the expansion of the globin gene family led to the separation and distribution of globin on many chromosomes in mammals, such that no chromosome has more than a single functional member of the globin gene family. (c) As globin gene family members diverged over the course of evolution, all the DNA sequence variations that have accumulated between family members are within the regulatory DNA sequences that affect when and how strongly each globin gene is expressed. (d) Some of the duplicated globin genes that arose during vertebrate evolution acquired inactivating mutations and became pseudogenes in modern vertebrates.