A dominant trait is represented by a capital letter
(1) reproductive hormones
(2) carbohydrates
(3) antibodies
(4) biological catalysts
Answer and Explanation:
All of the answer choices are molecules in our body. Let's look at the definition of each choice one at a time. Reproductive hormones such as testosterone and estrogen function to regulate reproductive functions such as menstrual cycle, sperm production etc.
Carbohydrates are molecules from which our bodies derive energy in the form of ATP.
Antibodies protect our bodies from the invasion of foreign particles (pathogens)
Biological catalysts, or enzymes help our body speed up and perform all of the reactions that need to be done such as cutting and copying DNA. Therefore, choice (4) is the correct answer choice.
Answer:
Option A
Explanation:
DNA sequence: GTCACCGGTCTATACATAAGC.
If the bases of codon 5 under a mutation of C to T, the outcome would be?
Bases of the sense codon 5 is TAC, since codons of the sense strand is the same as that of the mRNA except with the replacement of uracil in place of thymine. This codon TAC codes for tyrosine.
If a mutation occurs changing C to T, then the bases would be TAT coding also for tyrosine too due to the nature of redundancy of the genetic code. Thus, there would be no change to the protein sequence although a change would occur in the DNA sequence.
Redundancy of the genetic code indicate that more than one codon can code for an amino acid as there are 64 codons and 20 amino acids.
Answer: B. Pathways by which matter is transferred between organisms and the environment
Explanation:
Biogeochemical cycles can be define as cycles which involves the natural pathways by which inorganic and organic matter is transferred within the living organisms and the environment.
The essential elements such as water, carbon, phosphorous, nitrogen and oxygen are transferred among the various spheres of the earth like atmosphere, biosphere, lithosphere and others which forms the integral part of the non-physical environment.