DNA
The pairing of ____ in DNA is the key feature that allows DNA to be copied.
nitrogenous bases
What is the correct order of the cell cycle (be sure to include ALL steps)
interphase, prophase, metaphase, anaphase, telophase, cytokinesis
A group of 3 nitrogenous bases on a tRNA strand is called:
codon, anticodon
How many strands of nucleotides are found in RNA
1
What are the properties of the phospholipid head and phospholipid tail of the plasma membrane that allow it to be so effective?
The head and the tail both being hydrophilic.
The head being hydrophilic and the tail being hydrophobic.
The head being hydrophobic and the tail being hydrophilic.
The head and the tail both being hydrophobic.
The head being hydrophilic and the tail being hydrophobic.
What term do we use to describe DNA's shape?
double helix
What is the longest stage of the cell cycle?
interphase
How many codons are needed to specify three amino acids?
9
Sister chromatids are attached to each other at an area called the…?
centromere
Where does aerobic respiration take place in plant cells?
mitochondria
The backbone of a DNA molecule is made of which two components?
phosphate, deoxyribose
Do plant or animal cells form a cell plate during cytokinesis?
plant
The end product of translation is:
proteins
As a result of inserting one base into the RNA sequence, the entire code for polypeptide chain has been changed. This is an example of what type of mutation?
Frameshift
What are the bases attached to in DNA?
Deoxyribose (NOT the phosphate)
The female scientist that photographed DNA and helped to discover its structure was:
Rosalind Franklin
During normal mitotic cell division, a parent cell having eight (8) chromosomes in G1 will produce two daughter cells, containing how many chromosomes each?
8
Once a molecule of tRNA has released its amino acid, the tRNA:
is destroyed by enzymes
becomes attached to rRNA
moves away to pick up another amino acid
becomes attached to mRNA
Moves to pick up another amino acid
The diploid chromosome number in a certain species of fish is 20. How many chromosomes would normally be found in bone cell of this fish?
20
An example of an organelle that contains a double membrane, its own DNA, and would be self-replicating would be
mitochondria
In organisms that reproduce only asexually, genetic variation among offspring results from:
A. mutations
B. fusion of the egg and sperm
C. meiosis
D. vegetative propagation (cloning)
mutations
In organisms that reproduce only asexually, genetic variation among offspring results from:
A. mutations
B. fusion of the egg and sperm
C. meiosis
D. vegetative propagation (cloning)
mutation
A high concentration of an enzyme that breaks down RNA molecules is introduced into a cell. Which cellular activity would probably be affected first?
Oxidation of glucose
Hydrolysis of ATP
Synthesis of proteins
Metabolism of fats
Synthesis of proteins
Assume that the DNA of a cell is 40% adenine and 10% guanine. What is the percentage of Thymine and Cytosine
40% Thymine, 10% Cytosine
X-rays, ultraviolet light and radioactive substances that can change the chemical nature of DNA are classified as ____.
mutagens