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Marina CMI [18]
3 years ago
11

Define hypothesis and give an example of one.

Biology
1 answer:
Len [333]3 years ago
5 0

Answer: hypothesis is a if then statement for ex

Explanation:ex: if I study for a test then I will ace it

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Tissue culture experiments with PDGF demonstrate that without this substance _____.
Sergeeva-Olga [200]

Answer:

Answer is 2. Fibroblasts fail to divide.

Explanation:

Tissue culture experiment is the experiment where tissues are grown in an artificial medium. This involves the use of growth medium such as agar or broth. This process help to produce needed tissues in a short period of time.

Fibroblasts are cells which are found in the collective tissues, and they produce collagen. The collagen produced by the Fibroblasts play important role in tissue repair. Fibroblasts are regarded as the main cells in the connective tissue.

Note that, PDGF, which is Platelet -derived growth factor in full, is a growth factor regulating cell growth and it's division.

5 0
3 years ago
What is the state of maintaining a stable internal environment despite changing external conditions.
Tpy6a [65]

Answer:

Homeostasis

Explanation:

Homeostasis- state of maintaining a stable internal enviornment despite changing external conditions

7 0
3 years ago
Place the primers in the correct orientation and locations to amply this gene by pcr. if a primer does not belong in a particula
galina1969 [7]

DNA replication is the process of doubling a DNA double chain. In cells, DNA replication occurs before cell division. Prokaryotes continually replicate DNA. In eukaryotes, the timing of DNA replication is highly regulated, ie in the S phase of the cell cycle, before mitosis or meiosis I. The multiplication utilizes the DNA polymerase enzyme which helps form bonds between the nucleotides that make up the DNA polymer. The process of DNA replication can also be carried out in vitro in a process called a polymerase chain reaction (PCR).

<h2>Further Explanation </h2>

A slow strand (Lagging strand) is a DNA strand located on the opposite side of the leading strand on the replication fork. These strands are synthesized in segments called Okazaki fragments. In this string, primases form RNA primers. The DNA polymerase can thus use OH 3 'free groups in the RNA primer to synthesize DNA in the direction of 5' → 3 '. The primary RNA fragments are then removed (for example by RNase H and DNA Polymerase I) and new deoxyribonucleotides are added to fill the gaps that were previously occupied by RNA. DNA ligase then connects the Okazaki fragments so that the synthesis of lagging strands is complete.

Primers both on the steering strand and on the lagging strand will elongate with the help of Holoenzyme DNA polymerase III. This multisubunit complex is a dimer, half will work on the steering strand and the other half will work on lagging strands. Thus, the synthesis of the two strands will run at the same speed.

Each dimer part of the two strands consists of subunit a, which has the actual polymerase function, and subunit e, which has an editing function in the form of exonuclease 3'– 5 ’. In addition, there is a subunit b that attaches polymerase to DNA.

Once the primers in the remaining strand are removed by DNA polymerase III, they will be removed immediately and the gaps caused by the loss of the primer are filled with DNA polymerase I, which has 5 '- 3' polymerase activity, 5 '- 3' exonuclease, and editing 3 exonuclease '- 5'. Eksonuklease 5 '- 3' discard the primer, while the polymerase will fill the gap caused. Finally, the Okazaki fragments will be united by the DNA ligase enzyme. In vivo, the dimoenzyme DNA polymerase III and primosomes are believed to form large complexes called replisomes. With the replisom DNA synthesis will take place at 900 bp per second.

Learn more

DNA replication brainly.com/question/5932348

Details

Grade:  College

Subject:  Biology

keywords: DNA, RNA, replication.

4 0
3 years ago
Read 2 more answers
an energy pyramid illustrates that energy is a form of _____is lost to the surrounding as it is passed from one organism to the
Alborosie
An energy pyramid illustrates that energy in the form of heat is lost to the surrounding as it is passed from one organism to the next. In an energy pyramid energy is passed from one trophic level to the next, however, only ten percent of the energy in a given trophic level is passed to the next, as most of the energy is lost inform of heat to the surroundings. 
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3 years ago
Gray wolves in the rocky mountains
LUCKY_DIMON [66]
What are you asking for

5 0
3 years ago
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