Answer:
15. a solar array is a collection of multiple solar panels that generate electricity .
16. silicon
Explanation:
The correct answer is "early in b cell development, recombinase links one light-chain v gene segment to one j gene segment".
Recombinase is an enzyme whose function is genetic recombination. There are many different types of recombinase and one of these is the V(D)J recombination. This is a recombination occurring in developing lymphocytes during the beginning of the maturation of T and B cells. V(D)J recombination involves somatic recombination and its basis is the random rearrangement of variable (V), joining (J) and diversity (D) gene segments. This process ensures the lymphocyte diversity seen in all the different types of antibodies and T cell receptors found on B and T cells.
Answer:
This question lacks options; the options are:
A) Deletion mutation
B) Missense mutation
C) Inversion mutation
D) Nonsense mutation
The answer is D) Nonsense mutation
Explanation:
A mutation in genetics refers to the change in the nucleotide sequence of a gene or DNA segment. The occurrence of mutation in a gene leads to different effects, which is the basis of the different types of mutation. The type of mutation described in this question is called a NONSENSE MUTATION, which is a type of base substitution mutation.
Nonsense mutation is the mutation in which one nucleotide base in the sequence gets replaced by a STOP CODON (UAA, UAG, UGA), leading to the truncation of the amino acid sequence and hence, the production of a non-functional protein.
This is the case in this mutated gene sequence whose normal sequence codes for: Pro-Met-Glu-Arg-Asp. The mutation causes the codon specifying Glutamine to be replaced by either of the STOP codons, thereby, stopping the translation process. The stop to the translation process causes the amino acid sequence to be truncated and a non-functional amino acid sequence is formed: Pro-Met-
<u>Answer</u>: Ionic bond
<u>Explanation</u>:
- An ionic bond is a type of a chemical bond formed by the complete transfer of electrons from one atom to another atom i.e one of the atoms loses its electrons and the other gains it. This results in the formation of 2 oppositely charged ions.
- In sodium chloride, sodium loses one electron from its outermost shell (valence shell) whereas chloride gains it. Due to this sodium gains, a net positive charge and chloride gain a net negative charge.
- So, due to the complete transfer of electrons that takes place from sodium to chloride, the compound generated (Sodium chloride) has an ionic bond.
