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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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
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.