Answer:
Ninhydrin causes prints to turn a purple color, which makes them easily photographed. DFO (1,2-diazafluoren-9-one) is another chemical used to locate latent fingerprints on porous surfaces; it causes fingerprints to fluoresce, or glow, when they are illuminated by blue-green light.
Explanation:
While working in labs with chemicals or specimens one should follow good laboratory practices. Professional conduct and manner should be maintained during working in labs.
The action that should be taken by a student is:
Option B. Wear a lab apron or lab coat over the clothing.
The good lab practices can be explained as:
- To avoid staining clothes individuals should wear lab coats over their clothes.
- Lab coats avoid staining and splashing your skin and clothes from chemicals and dyes.
- Lab coats are designed to protect against corrosive chemicals from soaking into the skin.
Therefore, the student should wear lab coats and aprons.
To learn more about lab coats and laboratory practices follow the link:
brainly.com/question/609930
My 2 cents below, I tried to think through the other ones:
A. Yes, because an amino acid change has occurred.
(A gene mutation occurred, not an amino acid change)
B. Yes, because all mutations change the resulting protein.
(Sounds correct. Gene -> mRNA -> protein)
C. No, because the amino acid sequence has not been changed.
(The gene mutation means the amino acid sequence <em>has</em> changed)
D. No, because mutations in the DNA do not affect the mRNA sequence.
(They do so)
Answer:
The right answer is kidney, bladder, ureter, urethra.
Correct answer - Replace Thymine (T) with uracil (U) in the DNA molecule.
Why? - As the RNA polymerase continues down the strand of DNA, more nucleotides are added to the mRNA, thereby forming a progressively longer chain of nucleotides. This process is called elongation. DNA (top) includes thymine (red); in RNA (bottom), thymine is replaced with uracil (yellow).
