Plants roots display positive gravitropism which means they grow in the direction of gravity
Answer:
a. DNA carries instructions for the functions of every cell and enzyme in living organisms.
b. DNA can serve as a way to identify one individual from another.
Explanation:
Which of the following is TRUE about DNA?
a. DNA carries instructions for the functions of every cell and enzyme in living organisms.
b. DNA can serve as a way to identify one individual from another.
c. All living organisms can carry DNA in practically every cell of their body
Answer:
This question lacks options, however, it can be answered based on general understanding of the topic
The answer is SUBSTITUTION MUTATION
Explanation:
A mutation is any change that occurs in the nucleotide sequence of a gene. Mutation can be of different types depending on how it occurs. One type of mutation is SUBSTITUTION MUTATION, which is a mutation in which one or more nucleotide base is replaced by another in the sequence.
Nucleotide bases are read in a group of three called CODON. Each of these codons specify amino acid. Hence, if the nucleotide base sequence is altered during mutation, the amino acid sequence is altered likewise. In this case where the original amino acid sequence is: Met-Ala-Gln-Arg-Glu-Leu, the mutation affected the nucleotide bases coding for Arginine (Arg), hence changing it to Glycine (Gly).
This means that a base substitution mutation occured, replacing the amino acid Arginine with Glycine in the mutated sequence.
The answer to your question is B.
<u>Cell culture i</u>s the method applied by scientists to grown, cells in the laboratory setting to study the cells for particular reasons.
Explanation:
Cell culture is basically a method for survival, reproduction etc which are done under controlled conditions in the space outside the environment. This is also used for data mining.
Purpose: Cell culture is used for propagation of virus
Advantages:
- Vaccine production by replication of virus
- Detection of viral cell of virus
- Convenient easy and economical method
Disadvantages
- Maintenance of sterile aseptic conditions.
- Increases microbial contamination
- Cross contamination takes place
