What are the four unifying principles that form the foundation of modern biology?

1 answer:

5 0

Four unifying principles form the foundation of modern biology: cell theory, evolutionary theory, the gene theory and the principle of homeostasis. These four principles are the founding principles of each category of biology

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if you were to make a pitcher of sweet iced tea, which ingredient would represent solute? Which ingredient would represent the s

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Which is the correct alignment for a solar eclipse?

Elodia [21]

The correct alignment for a solar eclipse is sun - moon - Earth. It is letter A.

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1. Penumbra--The Moon's faint outer shadow.
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Read 2 more answers

An example of a secondary consumer is a _________.

erastovalidia [21]

A panther because it eats the primary consumer which would be the deer.
an oak tree is the producer (bottom of the food chain)
the deer is the primary consumer because it eats grass which would also be a producer
and the hawk would be the top predator because it eats a snake which would eat a mouse which would feed on a producer :)

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2 years ago

A student isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. After adding some D

aivan3 [116]

Answer:

DNA ligase

Explanation:

DNA replication is an enzyme mediated, 3-step process during which the DNA molecule produces a copy of itself. The 3 steps involved are as follows;

initiation
elongation
termination

Initiation involves the unwinding of the double helix structure of the DNA using DNA helicase enzyme

Elongation involves binding of RNA primer to the DNA strands and addition of bases to the primer to elongate the new chains. Bases are added to the leading strand continuously while the lagging strand is replicated in short segments (okazaki segments).

Termination involves the unbinding of RNA primer and substitution of its bases by DNA bases. The Okazaki fragments are then joined together using the DNA ligase enzyme.

The short, numerous segments of DNA observed in the mixture is the Okazaki fragments of the lagging strand. This is due to the absence of the enzyme involved in the joining of these fragments.

Hence, the answer is DNA ligase.

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3 years ago