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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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Which statement correctly describes organisms in this ecosystem? 1. Organisms in level B obtain their energy directly from the S
rosijanka [135]

Answer:

Option 4, Organisms in level D are heterotrophic.

Explanation:

Generally in a energy level or trophic level system, organisms are arranged on a pyramid scale in such a way that organism lying at the level A or the base of the pyramid are producers. They obtain energy from the sun and produce food for other organisms. Organism in level B is a herbivore which feed upon the plants to gain food and energy. In level C organisms that feed upon herbivores i.e the carnivores lies. At level D lies the microorganisms that feed upon dead remains of high order animals and plants. Hence, organisms at level D are called heterotrophs.  

Thus, option 4 is correct

3 0
4 years ago
Which structure(s) are connected to the peripheral nervous system? Select all that apply.
goldfiish [28.3K]

Answer: Here you go

Explanation: nerves (cranial, spinal, and peripheral) and neurons (sensory, motor)

4 0
3 years ago
Read 2 more answers
Discribe the types and importance of biological tools and identify their function​
lara31 [8.8K]

Answer:

The answer is below

Explanation:

There are different types of biological tools, with each of them having different functions. However, for the sake of the question, some of the popular tools will be listed here.

1. Stockroom tools: this includes:

Beaker: this is essential to take or storing small substances

Bunsen Burner: this is important in the biological lab to heat a substance

Flask: this is essential in holding liquid substance.

Pipette: it forms of a lab spoon that is used in mixing substances to form a compound or mixture

2. Computer and Imaging system: this is important in image analysis and sequence-analysis programs

3. Cell cultures: this is used in the biological lab to enhance the complex cell differentiation required in the experimentation of animal cell structure

4. Microscopes: this is essential in determining and examining the microscopic organism that we can not see with our makes eyes

8 0
3 years ago
If a child only eats fries, What macromolecule might be deficient and how will it affect her?
Elodia [21]

Answer:

carbohydrates

Explanation:

the child will have low energy

3 0
3 years ago
The _________ is a 5-inch long tube made of C-shaped hyaline cartilage rings lined with pseudostratified ciliated columnar epith
Sphinxa [80]

The <u>Trachea</u> is a 5-inch long tube made of C-shaped hyaline cartilage rings lined with pseudostratified ciliated columnar epithelium.

Hope that helps!

8 0
2 years ago
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