Sample of DNA isolated from bacterium X contains 175 of aden

Sample of DNA isolated from bacterium X contains 17.5% of adenine bases. What percentages of guanine, thymine, and cytosine bases would you expect to find in the same sample of DNA? Match the following types of transport across a biological membrane (designated I, II, or III) with the statements designated A-D: Simple diffusion (SD) Facilitated diffusion (FD) Active transport (AT) Write down your answers in the blank space next to each statement below. Note, that more than one answer may apply each statement: Process is energy dependent: ___ Process needs transmembrane transporter/channel: ___ Process occurs down the concentration gradient: ___ Processes can establish a concentration gradient: ___

Solution

Answer 2. Given that adenine bases in the isolated DNA of the bacterium is 17.5%. Since Adenine is known to pair with thymine. So, the percentage of thymine will also be 17.5%.

Adenine and thymine will make 35 % of the total nitrogen bases of the DNA. Rest of the DNA will be made from Guanine and Cytosine. Guanine and Cytosine are known to pair with each other. So, their content in the DNA will also be same. 100-35% will give us 65 %. So Guanine will be 32.5% and Cytosine will be 32.5%

Answer 3.

Process occur down the concentration gradient - Simple Diffusion(SD)

Process need transmembrane transporter/Channel- Facilitated Diffusion (FD)

Process is energy dependent- Active transport (AT)

Process can establish a concentration gradient- Facilitated Diffusion (FD) and Active transport (AT)