Chromosomes, Genes, and DNA

Question 1

DNA is composed of ____________.

two long parallel polynucleotide chains
two long polynucleotide chains twisted in a double helix
two short parallel polynucleotide chains
one coiled polynucleotide chain

Answer 1

two long polynucleotide chains twisted in a double helix

Question 2

Which of these nitrogenous bases are found in DNA?

Adenosine, genotropin, thymine, crystalline
Cytosine, adenine, guanine, thymine
Uracil, adenosine, thiamine, cytosine
Thymine, cytosine, adenine, uracil

Answer 2

Cytosine, adenine, guanine, thymine

Question 3

Which structure contains most of the genetic material in the cell?

Nucleus
Cell membrane
Ribosomes
Lysosomes

Answer 3

Nucleus

Question 4

Which of the following statements correctly describes what genes code for:

1 – More DNA

2 – Lipids and carbohydrates

3 – Proteins and RNA

4 – Proteins and lipids

Statements 1 and 2
Statements 1 and 4
Statement 3
Statements 3 and 4

Answer 4

Statement 3

Question 5

What role does genetic information play in linking a particular sequence of amino acids to produce a protein?

DNA is the template from which more DNA is built and messenger RNA acts as a bridge between the DNA and the transfer RNA.
DNA is the template from which messenger RNA is built and transfer RNA molecules act as bridges between the mRNA and amino acids.
DNA is the template from which transfer RNA is built, and the messenger RNA serves as its own bridge between itself and the amino acids.
DNA is the template from which messenger RNA is built and transfer RNA acts as bridges between the tRNA and the mRNA.

Answer 5

DNA is the template from which messenger RNA is built and transfer RNA molecules act as bridges between the mRNA and amino acids.

Question 6

Which of these is not a function of mitosis?

Asexual reproduction
Producing gametes
Repair of damaged tissue
Growth of the organism

Answer 6

Producing gametes

Question 7

The biggest packaging unit of DNA is:

The nucleotides
The genome
The chromosomes
The genes

Answer 7

The genome

Question 8

Which of the following statements is true?

Codons are made up from DNA
DNA makes up nucleotides
Codons are made up from nucleotides
Nucleotides are made up from DNA

Answer 8

Codons are made up from nucleotides

Question 9

Which of the following is the correct sequence?

RNA → DNA → Protein
DNA → RNA → Protein
Protein → RNA → DNA
Protein → DNA → RNA

Answer 9

DNA → RNA → Protein

Question 10

When DNA is being transcribed, it is read in codons. How many bases does each codon contain?

3
4
5
6

Answer 10

3

Question 11

Choose the correct complementary bases for the following DNA strand: TCAGGA

GACTTC
AGTCCT
CTGAAG
TCAGGA

Answer 11

AGTCCT

Question 12

Protein folding is determined by ________________.

The amino acid sequence
Number of mitochondria in the cell
tRNAs
Cell age

Answer 12

The amino acid sequence

Question 13

Which of the following statements is correct?

Chromosomes are replicated only during embryonic development
Chromosomes are replicated during a phase in the cell cycle
Chromosomes are replicated only during apoptosis
Chromosomes are replicated only twice in the cell cycle

Answer 13

Chromosomes are replicated during a phase in the cell cycle

Question 14

A chromatid can be defined as:

The level of DNA condensation during meiosis
The joining between two chromosomes
One copy of a new chromosome
The level of DNA condensation during mitosis

Answer 14

One copy of a new chromosome