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Svetach [21]
3 years ago
6

Viral Spikies

Biology
1 answer:
kati45 [8]3 years ago
3 0

Answer:

B)attach specifically to host cell receptors

Explanation:

Viral spikes are one of the envelope proteins. These proteins are coded for by viral genes. Viral spikes project from the envelope surface. They are also called peplomers. One of the functions of these spikes is to specifically interact with the receptors present on the surface of the host cell to mediate the attachment of the virus to the host cell surface. Viral spikes and the host cell surface receptors are complementary to allow their specific binding. For example, the spike protein of the SARS-coronavirus bind specifically to the human host cell receptor ACE2.

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Compared to a solution of PH3 a solution of pH one is
lara31 [8.8K]
ANSWER: compared to PH3 a PH1 would be more acidic than a PH3



Explanation: so on the PH scale 1 is acid 7 is neutral and 14 is alkaline. PH1 would be stomach acid, a PH3 would be vinegar.
4 0
3 years ago
A fruit fly population has a gene with two alleles, A1 and A2. Tests show that 70% of the gametes produced in the population con
IceJOKER [234]

Answer:

Option C

Explanation:

Given ,

A1 allele is carried by 70 % people

Let us assume A1 s dominant genotype

This means p= \frac{70}{100} = 0.7

Thus, frequency of allele in the given population is 0.7

It is also given that the population is in Hardy-Weinberg equilibrium thus

p+q=1\\0.7+q=1\\q = 1-0.7\\q= 0.3

Frequency of fruit fly with genotype A2A2 will be

q^2\\= (0.3)^2\\= 0.09

As per Hardy-Weinberg's second equation of equilibrium

p^{2} + q^{2} + 2pq = 1\\0.49+0.09+2pq = 1\\2pq = 1-0.49-0.09\\2pq= 0.42

Hence, option C is correct

7 0
3 years ago
How do you receive ADA (attendance) credit?​
DaniilM [7]

Answer:

ADA is an enzyme that is used to breakdown the food chain.

Explanation:

ADA is also called adenosine deaminase. It is an enzyme. It is a purine metabolism. ADA is used to needed for the breakdown of the adenosine from the food chain.  ADA is found in both small and large form. The enzyme presented in it has polypeptide chain. It is folded in eight strands.

The ADA contain zinc. It is found in deepest site and combined with five form such as 15, 17, 214, 295 and the substrate.

The ADA is is inversible dominates the adenosine. It is considered the key enzyme of the purine metabolism. ADA in human beings work for development and maintenance.

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3 years ago
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neonofarm [45]

Answer:

Mean sea level (MSL) (often shortened to sea level) is an average level of the surface of one or more of Earth's bodies of water from which heights such as elevation may be measured.

Explanation:

3 0
3 years ago
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Difference between chlorenchyma and parenchyma​
astraxan [27]

Answer:

Explanation:

Parenchyma

1. They have thin cell wall.

2. Their cell wall is made up of cellulose.

3. They are unspecialized tissues.

4. The are found in soft part of the plant.

5. They undergo photosynthesis and can stored the food and also play important role in gaseous exchange.

6. There are spaces between the cells.

Collecchyma.

1. They are thick cell walls.

2. Their cell walls are made up of cellulose and lectin.

3. They are specialized tissues

4. They are found in plants leaves and petioles.

5 The do not undergo photosynthesis but act to give mechanical support to plants.

6. They have little intercellular spaces.

Parenchyma and collecchyma are both tissues found in plants..

8 0
3 years ago
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