Answer:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA
is copied or as the result of environmental factors. All BUT ONE of the statements below correctly
describes or explains genetic mutations.
A) Mutation can disrupt normal cell activity and cause diseases, like cancer.
B) Mutations in parents' cells are then passed down to offspring via reproduction,
C) Our cells can recognise any potentially mutation-causing damage and repair it Eliminate
before it permanent.
D) Mutations can occur as the result of exposure to environmental factors such as
smoking, toxins and radiation.
Answer: By the number of legs it has.
Explanation: Millipedes have hundreds of legs while centipedes have way less.
Answer:
For the tRNA anticodon CCA the corresponding codon is GGU, which codes for the amino acid Glycine (Gly).
Explanation:
Transfer RNA or tRNA is responsible for driving the right amino acid into protein synthesis, once the mRNA codon has been translated by the ribosome. It is for that reason that each mRNA codon must have a complementary tRNA anticodon.
The RNA pairing rules is that each nitrogenous base has a complementary base, so:
- Adenine is complementary with uracil A=U
- Cytosine is complementary with Guanine C=G
In this case, it can be seen that:
- <em>For the anti-codon: CCA</em>
- <em>Codon: GGU</em>
- <em>Aminoacid: Gly</em>
Feeling pain, hunger, thirst, sleepiness, and being aware of our thoughts and emotions are all examples of Internal stimuli.
Answer: Option A.
nephron loop multiplies the concentration of salts in the interstitial fluid of the kidney medulla.
Explanation:
countercurrent multiplier is a system that utilize energy that create osmotic gradients and enable reabsorption of water thereby increase concentration of urine. The countercurrent multiplier uses electrolyte pumps there by making the nephron loop increase the concentration of salts in the interstitial fluid of the kidney medulla because it allows the nephron to reabsorb alot of water and and increase the concentration of urine for excretion while at the same time using as little energy as possible.
