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taurus [48]
3 years ago
6

Which of these occurs first?

Biology
1 answer:
SpyIntel [72]3 years ago
7 0

Answer:

The correct answer is a.  Helicase unwinds DNA

Explanation:

DNA replication is a process in which DNA make it's own copy. There are several enzymes and factors which access the DNA replication process like helicase, primase, SSB protein, DNA polymerase etc.

The first step in DNA replication is the unwinding of double stranded DNA which is accomplished by an enzyme called Helicase. Helicase opens up the double stranded DNA at replication fork by breaking the hydrogen bond between the nucleotides of complementary strands.

This provides a single stranded template for DNA polymerase to form a new complementary strand. In <em>E. coli </em>Dna B is the primary helicase and in humans the primary helicase is MCM( minichromosome maintenance protein complex).

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Need help...<br><br><br> Describe two problems a plant might encounter during reproduction
antiseptic1488 [7]

Answer:

During reproduction plant might experience absence of pollinators or presence of low temperature

Explanation:

Following can be the problems a plant might encounter during reproduction

  1. Presence of Low temperature for long time: Due to presence of low temperature during the reproduction of plants for long period of time it will break its dormancy and freeze the blossom or developing fruit
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4 0
3 years ago
What is osmosis? Please help me
KIM [24]
First off, we need to understand that osmosis is typically used with the example of water---
To understand that, osmosis is taking water from a high concentration to a low concentration to make the membrane equal to one another .
Imagine you have a pea, and the pea is about to explode of water. And you have another pea that's shriveled up. You would take some of the exploding water's pea into the shriveled one, therefore making it equal. (Thats my example I like to use!)
I hope this helped!
4 0
3 years ago
Whitch statement explains how producers are dependent upon consumers for their survival?
NeX [460]

Answer: Hello your answer is.....

The correct answer is: Consumers

Explanation:

Consumers produce carbon dioxide for producers to use during photosynthesis.

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6 0
3 years ago
What are the reactants and the products in this equation?<br><br> 2H2 + O2 → 2H2O
Hitman42 [59]

Answer:

Reactants: hydrogen and oxygen

Products: water

Explanation:

The reactants are what goes into a reaction, i.e. what is reacting. The products are what is formed. The reactants are usually shown on the left, and the products are usually shown on the right.

We can see in this equation that hydrogen (2H2) is reacting with oxygen (O2) to form water (2H2O). Therefore the reactants are hydrogen and oxygen, and the product is water.

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3 years ago
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