A student has isolated a large compound (macromolecule) from cells. Chemical analysis of the compound shows that it is made up of the following elements: carbon, hydrogen, oxygen, nitrogen, and sulfur
To which group of macromolecules does this compound most likely belong? A) carbohydrate
B) protein
C) nucleic acid
D) lipid
E) aqueous
B
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The region of DNA sequences before the start of a gene is often called the promoter. One type of promoter is called the TATA box. Many species' promoters are TATA boxes or a variation of the TATA box
Many species' promoters are TATA boxes or a variation of the TATA box. DNA sequences that are similar in different organisms are called ____ sequences. Fill in the blank with the appropriate word.
Lateral roots are the product of the
a. pericycle. b. vascular cylinder. c. epidermis. d. apical meristem. e. endodermis.
Which of the following would be at the highest trophic level?
A. a lion B. a grasshopper C. a mushroom D. a grass plant
Cri-du-chat syndrome is caused by a deletion on chromosome 5; deletions occur when _____.
A) a portion of a chromosome is relocated onto a second chromosome B) homologous chromosomes fail to separate during meiosis C) a portion from the end or within the middle is lost D) a son inherits a defective X chromosome from his mother E) a section of chromosome breaks free but is reconnected to its chromosome in reverse order