Which of the following statements best describes the termination of transcription in prokaryotes?
a. rna polymerase transcribes through the polyadenylation signal, causing proteins to associate with the transcript and cut it free from the polymeraseb. rna polymerase transcribes through the terminator sequence, causing the polymerase to fall off the dna and release the transcript. c. rna polymerase transcribes through an intron, and the snrnps cause the polymerase to let go of the transcript. d. once transcription has initiated, rna polymerase transcribes until it reaches the end of the chromosome. e. rna polymerase transcribes through a stop codon, causing the polymerase to stop advancing through the gene and release the mrna.

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping