B pollen tube i remember this question only cause my teacher had created a quiz let which i studied <span />
The correct answer is Chitin. Arthropods have an exoskeleton made of chitin. Usually, arthropod exoskeleton is wrapped by tough and thickened chitin that has many minerals and hardened proteins. Chitin can be found in the exoskeleton of crabs, lobsters, shrimps, and even squid.
Options for the question are not given. They are as follows:
a. arg or lys
b. ala
c. thr
d. leu or ser
e. Only termination codons
Answer:
d. leu or ser
Explanation:
Four codons code for proline amino acid. These are CCT, CCC, CCA, and CCG. Hydroxylamine causes C to change into T or G to change into A.
If first position is changed in each codon:
CCT = TCT (UCU)
CCC = TCC (UCC)
CCA = TCA (UCA)
CCG = TCG (UCG)
These codons produce Serine amino acid.
If second position is changed in each codon:
CCT = CTT (CUU)
CCC = CTC (CUC)
CCA = CTA (CUA)
CCG = CTG (CUG)
These codons produce Leucine amino acid.
Hence, out of the given options, option d. leu or ser is correct.
A because that’s the final products of photosynthesis