An increase in hdl reduces the risk of heart failure
Answer:
a. DNA carries instructions for the functions of every cell and enzyme in living organisms.
b. DNA can serve as a way to identify one individual from another.
Explanation:
Which of the following is TRUE about DNA?
a. DNA carries instructions for the functions of every cell and enzyme in living organisms.
b. DNA can serve as a way to identify one individual from another.
c. All living organisms can carry DNA in practically every cell of their body
Answer:
The fewer H-bonds for A-T-rich dsDNA cause its two strands to stick together less well than G-C-rich dsDNA.
Explanation:
DNA is a double helix in which two DNA strands are held together with the help of hydrogen bonds formed between their complementary bases. Adenine of one DNA strand always forms two hydrogen bonds with thymine of other DNA strands. Likewise, guanine of one DNA strand pairs with cytosine of other DNA strands by the formation of three hydrogen bonds.
The presence of lesser hydrogen bonds in AT base pairs makes an AT-rich DNA double helix to melt at lower temperatures. On the other hand, a GC rich DNA double helix has a higher melting point as more amount of energy is required to break three hydrogen bonds per base pair as compared to only two H-bonds per AT pair.
Most insects have small holes in the exoskeleton called spiracles, which open and close to regulate the air flow. The holes lead to the trachea. The correct answer is C, spiracles.
The correct answer is b, photosynthesis.