Question

Then, bubble in the correct answers 1. During protein synthesis ribosomes move along! A. tRNA B. histons C. Plasmids D. mRNA 2. Constitutive genes are transcribed: A. Sometimes B. Constantly C. Depending on the environmental factors D. Never 3. The most serious type of mutation is a mutation. A. point B. silent C. frameshift D. back 4. Base pairs in DNA are held together by bonds. A. Peptide B. Non-polar covalent C. Polar covalent D. Hydrogen 5. The expression of genetic traits is the A. Genome B. Genotype C. Proteome D. Phenotype 6. The DNA is made up of subunits called A. Histones B. Amino acids C. Nucleotides D. mRNA 7. Each nucleotide is composed of A. One phosphate, one nitrogenous base, one sugar B. One phosphate, one nitrogenous base, two sugars C. Two phosphates, one nitrogenous base, one sugar D. Two phosphates, one nitrogenous base, two sugars

Answer 1

Hi there, as per my guidelines, i would like to answer your first four questions. You may ask other questions as another query.

1. The correct answer is D. mRNA,

During the translation of proteins from mRNA template, the tRNA brings amino acids to ribosome unit where it binds to its complementory codon in mRNA, a correct binding initiates forward movement of ribosome, with peptide chain being formed.

2. The correct option is B. constantly,

Constitutive genes are kind of genes which are essential in maintaining the cellular function of our body, so they need to be transcribed and expressed continuously, unlike facultative genes which are not essential and they are expressed when needed.

3. The correct answer is C. frame shift mutation,

Unlike point mutations, which lead to change in single amino acid of a polypeptide chain, sometimes which does not even have a comparable lethal effect on cell, the frame shift mutation however leads to insertions or deletions of two or more bases which can shift entire reading frame of a sequence, which leads to translation of an entirely different type of protein, leading to harmful effects.

4. The correct answer is D. hydrogen,

The base pairs are connected to each other by hydrogen bonds, where two complementary nucleotides, adenine with thymine and guanine with cytosine are paired with each other.

Hope this helps.