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Rom4ik [11]
3 years ago
11

Which does NOT affect a molecules ability to cross a cell membrane?

Biology
2 answers:
Nataliya [291]3 years ago
8 0

Answer:

concentration inside and outside the cell

aivan3 [116]3 years ago
3 0

Answer:

b concentration insid e and out side the cell

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George on one pair of his chromosomes has STRs of lengths 6 and 7, Stephen (his father) STRs of lengths 3 and 6, and Mary (his m
JulijaS [17]

Answer:

Stephen is not his biological father.

Explanation:

DNA fingerprinting is a technique use to determine the DNA sequence of an individual organism. Short tandem repeats are unique among the individuals ans used to identify the individual in population.

The George DNA fingerprinting shows that he has STRs length of 6 and 7. Stephen's STRs does not match with his son George whereas Mary shows some similarities with George STRs. This indicates that Stephen is not the biological father of George because the biological father's STRs must match with the children STRs.

Thus, the correct answer is option (a).

4 0
3 years ago
During DNA replication, if one base is substituted for another, ____ occurs.
lakkis [162]
Answer:

Point mutation

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4 0
2 years ago
Can someone explain anticondons?
dusya [7]

Answer:

Anticodon Definition. Anticodons are sequences of nucleotides that are complementary to codons. They are found in tRNAs, and allow the tRNAs to bring the correct amino acid in line with an mRNA during protein production. Their anticodons, which pair-bond with codons on mRNA, allow them to perform this function.

Hope it helps!!!!

5 0
3 years ago
Read 2 more answers
Discuss the meaning and importance of selective toxicity as it relates to antimicrobials.
Burka [1]
An antimicrobial<span> is an agent that kills microorganisms or inhibits their growth. </span>Antimicrobial <span>medicines can be grouped according to the microorganisms they act primarily against. For example, antibiotics are used against bacteria and antifungals are used against fungi.
</span>
Selective toxicity<span> refers to the ability of the drug to targets sites that are relative specific to the microorganism responsible for infection. Sometimes these sites are unique to the microorganism or simply more essential to survival of the microorganism than to the host.

Selective theory relates to antimicrobial because the antimicrobial is the drug that kills microorganisms and inhibits there growth,  selective theory is the ability of the drug.
</span>
8 0
3 years ago
3. Suppose you are viewing a sample from a PURE culture and observe both red and purple cocci. What are the possible problems th
Scorpion4ik [409]

Answer:

The culture might not be stained properly or the culture might be too old.

Explanation:

Gram staining is done to differentiate between gram-positive and gram-negative bacteria according to the difference in their cell wall. In gram staining, the gram-positive bacteria appears violet and gram-negative bacteria appear pink in color.

Therefore if a pure culture contains have both red and purple cocci that it can be concluded that the gram stating was not done properly like too much destaining was done or too much safranin was used or maybe the culture is too old so that cell wall of some bacteria degrades.

7 0
2 years ago
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