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3 years ago

What are two examples of proteins

Biology

2 answers:

raketka [301]3 years ago

8 0

Answer:

In surgery for a heart attack, a middle-aged woman has a vision of God by her bedside. “Will I die?” she asks.

God says, “No. You have 30 more years to live.”

With 30 years to look forward to, she decides to make the best of it. So since she’s in the hospital, she gets breast implants, liposuction, a tummy tuck, hair transplants, and collagen injections in her lips. She looks great! The day she’s discharged, she exits the hospital with a swagger, crosses the street, and is immediately hit by an ambulance and killed. Up in heaven, she sees God. “You said I had 30 more years to live,” she complains.

“That’s true,” says God.

“So what happened?” she asks.

God shrugs. “I didn’t recognize you"

vlabodo [156]3 years ago

7 0

Answer:

Protein is the basic component of living cells and is made of carbon, hydrogen, oxygen, nitrogen and one or more chains of amino acids. The three types of proteins are fibrous, globular, and membrane.

Examples:-actin, myosin, titin, hemoglobin, protein Z, etc.

Explanation:

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Describe how two abiotic factors can move into the trees in a rain forest ecosystem

makkiz [27]

Answer:

The abiotic factors are non-living factors that interfere with the forest ecosystem. Two abiotic factors are the amount of rain and sunlight. The amount of these two abiotics determines how much a tree will grow or how thick and diverse the population of trees in a forest will be.

Explanation:

8 0

2 years ago

To see a whole insect under a microscope, you would probably not use a...

Kazeer [188]

C.) Scanning electron microscope. You would not be able to see a whole insect with one of these.

Hope this helped :)

6 0

3 years ago

As a child, you contracted hand, foot, and mouth disease, which is caused by a virus. Several years later, your sibling also con

Kaylis [27]

The answer is <em>A.) You have antibodies that already recognize the virus</em>

Viruses and diseases are always changing. When we get sick with say the flu, a virus, or the cold of sorts, our body attacks it until it fights off the disease. You can't get sick from the same strand of sickness because once your body defeats the virus, it knows how to protect the body from it because of the antibodies, so the virus ends up evolving to get past your immune system again.

I hope this helped! Have a wonderful day :)

5 0

3 years ago

Describe natural selection- when does natural selection occur?

sashaice [31]

Answer:

The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.

Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

7 0

3 years ago

In Drosophila, the genes for withered wings (whd), smooth abdomen (sm) and speck body (sp) are located on chromosome 2 and are s

lesya692 [45]

Answer:

A) 47; B) 33; C) 272; D) 122

Explanation:

The three genes are linked.

The female with withered wings and a smooth abdomen has the genotype whd sm sp+/whd sm sp+.

The male with a speck body has the genotype whd+ sm+ sp/whd+ sm+ sp.

Both individuals are homozygous for all genes, so each of them only produces one type of gamete. The resulting F1 therefore has the genotype whd sm sp+/ whd+ sm+ sp, heterozygous for all genes and with a wild-type phenotype.

The females of the F1 were mated with homozygous recessive males (test cross): whd sm sp/whd sm sp.

If we assume interference is 0, the probability of crossing over happening between the genes whd and sm is independent from the probability of crossing over happening between sm and sp.

The distance = frequency of recombination × 100, so the frequency of recombination (RF) between genes whd and sm is 0.305 and the RF between genes sm and sp is 0.155.

<u>The expected double crossover progeny among the 1000 offspring will be:</u>

RF whd-sm × RF sm-sp × 1000 =

0.305 × 0.155 × 1000 = 47 individuals will be double crossover.

Interference is 0.3

The interference is calculated as 1- coefficient of coincidence (cc).

cc = observed double crossover/expected double crossover

Therefore:

I = 1 - cc

cc = 1 - I

Observed DCO / 47 = 0.7

Observed DCO = 0.7 × 47

Observed DCO ≅ 33

The parental gametes are whd sm sp+ and whd+ sm+ sp (the genotype of the F1 female is known).

Looking at them and at the gene map we can tell that the gametes that give rise to withered wings, speck body (whd sm+ sp) and smooth abdomen (whd+ sm sp+) phenotypes are the result of recombination occurring between genes whd and sm.

To calculate the expected number of individuals with those phenotypes among the 1000 progeny we need to determine the frequency of recombination between the genes whd and sm considering there's interference.

The distance whd-sm = RF x 100

The recombination frequency is the sum of the single crossover between whd and sm and the double crossovers.

The frequency of DCO is 33/1000=0.033.

Distance whd-sm/ 100 = SCOwhd-sm + DCO

0.305 - 0.033 = SCO whd-sm

<u>Frequency of SCO whd-sm= 0.272</u>

And the expected number of individuals with those phenotypes will be 0.272 x 1000 = 272.

The gametes that originate the phenotypes withered wings, speck body, smooth abdomen (whd sm sp) and wild type (whd+ sm+ sp+) are the result of recombination between genes sm and sp.

Distance sm-sp/ 100 = SCOsm-sp + DCO

0.155 - 0.033 = SCOsm-sp

<u>Frequency of SCO sm-sp= 0.122</u>

And the expected number of individuals with those phenotypes will be 0.122 x 1000 = 122.

6 0

3 years ago