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andrew-mc [135]
3 years ago
7

What is the role of DNA helicase during DNA replication?

Biology
2 answers:
nadya68 [22]3 years ago
3 0
Helicase "unzips" the two strands of DNA. During DNA replication.
Mama L [17]3 years ago
3 0

Answer:

Helicase enzyme melts the DNA double helix and forms single stranded DNA strands.

Explanation:

Helicases are ATP dependent enzymes that bind to the DNA at the origin of replication. Helicases move along the DNA and use the energy of ATP to breakdown the hydrogen bonds between complementary base pairs that otherwise hold the two DNA strands together.  

Breaking of hydrogen bonds releases two DNA strands from each other. These single-stranded DNA molecules then serve as the template for DNA replication.  

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Alone in the woods, Pedro hears a noise. He thinks he sees a bear coming toward him. His heart starts pounding and then, a momen
pishuonlain [190]
<h2>Cannon -Bard theory</h2>

Explanation:

  • Alone in the woods, Pedro hears a noise. He thinks he sees a bear coming toward him. His heart starts pounding and then, a moment later, he realizes how frightened he is. This sequence of events is BEST explained by the <u>Cannon-Bard t</u>heory of emotion.

According to Cannon-Bard theory, all the emotional expressions occur due to the stimulation of hypothalamic structures present in brain. This theory also states that feeling and physiological effects of an emotional stimuli occurs simultaneously.

Here, James thinks that a bear is coming, this is a stimulus. His heart starts pounding that is the physiological effect of the stimulus and the next moment he feels frightened which is a feeling.

So we conclude that in this case, the physiological effect and feeling of emotion occurred simultaneously. So these sequence of events is best explained  by Cannon-Bard's theory.

3 0
3 years ago
Read 2 more answers
How do sensory receptors send messages to the brain?
dezoksy [38]

Answer:

4

Explanation:

How do (sensory) receptors send messages to the brain?

Via (sensory) neurons

8 0
3 years ago
Which best describes the interaction between autotrophs and heterotrophs?
nekit [7.7K]
Heterotrophs eat Autotrophs & depend on them for their energy supply

Hope this helps!
8 0
3 years ago
Between gamete and Zygote which one has sex cells
Nadusha1986 [10]

Answer: Gamete

Explanation: <u>Gametes are an organism's reproductive cells.</u> They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome.

5 0
3 years ago
When scientists discuss the Sixth Extinction, they are referring to which pattern in the rate of extinction?
Travka [436]

Explanation:

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please. follow. me

8 0
3 years ago
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