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butalik [34]
2 years ago
7

Q 1. Choose the best answer. What do the projections on the outside of a virus allow?​

Biology
1 answer:
alina1380 [7]2 years ago
4 0

Answer:

C

Explanation:

i did this in my science

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1. If we want to describe work, we must have (2 points)
MatroZZZ [7]

Answer:

Yes cause work is used by energy ⚡ and energy is the ability to do something

6 0
2 years ago
True or false Solutions of equal solute concentration are isotonic.
Phoenix [80]

Answer:

Explanation:

now you have two mixtures of different solute concentrations. In comparing two solutions of unequal solute concentration, the solution with the higher solute concentration is hypertonic, and the solution with the lower solute concentration is hypotonic. Solutions of equal solute concentration are isotonic.

3 0
3 years ago
In a DNA double helix an adenine of one strand always pairs with a(n) _____ of the complementary strand, and a guanine of one st
notka56 [123]

Answer:

adenine pairs with Thymine  and guanine always pairs with cytosine respectively

Explanation:

In DNA nucleotide subunits, there are four nitrogenous bases:

  •    Adenine (A)
  •    Thymine (T)
  •    Cytosine (C)
  •    Guanine (G)

Each of these bases can be divided into two categories: purine bases and pyrimidine bases.

Adenine and guanine are examples of purine bases. This means their structure is a nitrogen-containing six atom ring joined with a nitrogen-containing five atom ring that share two atoms to combine the two rings.

Thymine and cytosine are examples of pyrimidine bases.

Note that  RNA replaces thymine with a different pyrimidine base called uracil (U).

The complementary base pairing rule, Chargaff's rule states that DNA base pairs are always adenine with thymine (A-T) and cytosine with guanine (C-G). A purine always pairs with a pyrimidine and vice versa. However, A doesn't pair with C, despite that being a purine and a pyrimidine.

8 0
4 years ago
Which two globin genes are most divergent from each other? what is the percent amino acid identity between them?
tiny-mole [99]

Globin 1 and globin 2 genes of insects are understood to have diverged approximately 170 million years ago, through duplication, from a common globin gene ancestor. The two genes that code for haemoglobin have conserved regions; oxygen-binding and heme- regions. Globin 2 gene has lost the intron region that is still present in the globin 1 gene. The percentage divergence is 7.2% with 20 varying nucleotides.





8 0
3 years ago
NEED HELRIGHT ANSWERS ONLY
patriot [66]

Can someone please help me

4 0
4 years ago
Read 2 more answers
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