Author: Anonymous

Sustainability in healthcare refers to:

In the US most hospitals are for profit.

Since the passage of the Affordable Care Act all Americans now have reasonable access to healthcare and the ability to pay for it.

A researcher hypothesizes that RNA molecules were present in the most recent common ancestor of all living Which of the following scientific questions would best test the hypothesis?

The area covered by tropical rain forest is reduced by millions of hectares per year due to agriculture and logging. Which of the following best describes a likely result of tropical rain forest deforestation?

Which of the following communities is likely to be most stable?

Iridium is an element that is rare on Earth but commonly found in meteorites. A scientist believes that the first organic molecules may have come to Earth on meteorites 3.6 billion years ago. Which of these would be an appropriate null hypothesis to test related to whether meteorites hit the Earth 3.6 billion years ago?

Which of the following is most likely to create genetic variation in a population?

The diagram below illustrates the results of electrophoresis of DNA sequences obtained from a family of two adults and three children, and amplified using PCR. The bands represent short repeating sequences of variable length. Results for another female (X) are included for comparison. Beginning with the origin there are six lengths of DNA fragments that have separated on the gel. For each fragment the individual that has a band at that basepair length on their gel will be listed. The largest fragment, fragment one: father, child one. Fragment two: child three. Fragment three: mother, child one, child two, X. Fragment four: X. Fragment five: father, child two, child three. Fragment six: mother. The banding patterns of the DNA fragments reveal that

Figure 1 represents part of a process essential to gene expression. The two strands of the helix are paired at each end but are separated in the central portion. Bases of the nucleotides are indicated for the entire length of each strand. The left end of the upper strand is labeled 5 prime, and the right end is labeled 3 prime. The left end of the lower strand is labeled 3 prime, and the right end is labeled 5 prime. The lower strand is also labeled Strand X. An additional single strand of nucleotides that is complementary to the lower DNA strand is also present on the left and central portions of the figure. The sequence of the strand, from the left 5 prime end to the right 3 prime end, is as follows: A U G C C G C A A U C U G U U C A C G C A C U C A U G U G. Above the strand an arrow labeled Direction of Synthesis points along the strand from left to right. Figure 1. Model of process involved in gene expression. Which of the following best explains what strand X represents?