Answer:DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine. Two of the bases, adenine and guanine, have a double-ring structure characteristic of a type of chemical called a purine.
Explanation:
Answer: There are about 120 million rods in the human eye and about 6 million cones.
Explanation:
The retina of the eye consists of two photoreceptors which are called as rods and cones. The rods are numerous and are about 120 millions in numbers, these are more sensitive then the cones. The rods are sensitive to the light intensity but are less sensitive to the color.
There are about 6 million cones in the eye and these provides sensitivity towards the detection of color. These are more concentrated in the spot which is called as the macula.
Answer:
A. Prokaryotic
Explanation:
The prokaryotic type cell lacks a nucleus and other organelles.
Answer: The enzyme being targeted by this type of drug is DNA topoisomerase or DNA gyrase.
Explanation: Replication requires not just a single DNA polymerase but different enzymes and proteins, each performing a specific task. DNA helicase separates the two parental DNA strands that act as templates in replication by moving along the DNA and separating the strand using chemical energy from ATP. DNA topoisomerase or DNA gyrase relieves the torsional strain or topological stress generated by DNA unwinding. DNA-binding proteins binds and stabilizes the separated single-stranded DNA. Primase synthesizes the short segments of RNA (RNA primers) which must be present on the template before DNA polymerase can begin to synthesize DNA.
Most predators have forward facing eyes, while most prey have side mounted eyes. If you think about the animal behaviors of both prey and predators, you should be able to make connections between their eye placement and their necessities for survival. Most prey have side mounted eyes because it allows for a better depth perception and a wider field of view. This can help the animals keep watch while they graze in open fields. On the other hand, most predators have forward facing eyes because it allows them to focus in on prey while hunting and chasing.
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