Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
55 Cards in this Set
- Front
- Back
Which functions are served by cell division?
|
It allows surface area to keep up with the growing volume of an organism
-it replaces cells that wear out or are damaged -it produces many types of cells that serve a variety of functions |
|
Interphase is...
|
The period between cell divisions
|
|
During G1 and G2, cells synthesize...
|
Proteins, RNA, and other macromolecules
|
|
Adult cells that do not, or rarely, divide will be found primarily in what phase og the cell cycle?
|
G0
|
|
Transmission of hereditary information is associated with...
|
chromosomes
|
|
After normal miotic division, how many chromosomes does each offspring cell contain, as compaared to the parent cell?
|
The same number
|
|
In eukaryotic cells, when does chromosome replication occur?
|
During interphase
|
|
Watson anc Crick described the DNA molecule as a ...
|
double-straded molecule
|
|
What keeps the new nitrogen basees together after they attack to the old nitrogen bases?
|
The hydrogen bonds between the nitrogen bases
|
|
Which of the following statements are true?
-all genes are alwasy expressed in all cel types -Gene expression is random and occurs by chance -Different cell types have different sets of genes -Gene expression is controlled differently in specific cell types |
-Gene expressions is controlled differently in specific cell types
|
|
DNA controls protein synthesis by...
|
encoding amino-acid sequence
|
|
mRNA carries the genetic code of DNA because
|
-the mRNA has a sequence exctly complementary to the DNA
|
|
The sequence of nucleotides in a messenger RNA molecule (mRNA) is determined by the squence of nucleotides in a....
|
DNA molecule
|
|
The ribiosomes of a cell are sites for the synthesis of....
|
ATP
|
|
Which compound is part of the structure of another compound that is listed:
-amino acids -enzymes -nucleic acids -none of the above |
Amino acids
|
|
Which compounds are catalytic proteins
|
Amino acids
|
|
One type is abbreviated as DNA
|
nucleic acids
|
|
They act to change the rate of chemical reactions
|
Enzymes
|
|
One type is the carrier of hereitary information
|
Nucleic acids
|
|
How did scientists determine hat using a single and soble nitrogen bases for the coeds foramino acids would not be sufficient?
|
Scientists knew that there were 20 different amino acids therefore at least 3 bases were needed
|
|
Which molecule contains thymine?
|
DNA molecules
|
|
Which molecules are capable of duplicating themselves in plants and animals
|
DNA molecules
|
|
Which molecules are composed of a specific aminoacid sequence?
|
Neither DNA nor RNA
|
|
Three nucleotides, when taken together, represent a hereditary code (reference is made to)
|
Both DNA and RNA
|
|
The code alphabet seems to consist of 4 letters, or nucleotides (reference is made to)
|
both DNA and RNA
|
|
The functioning of the code occurs in the robosomes (reference is made to)
|
RNA
|
|
proteins are composed of amino acids (refverence is made to)
|
neither DNA nor RNA
|
|
The code is involved in protein synthesis (reference is made to)
|
both DNA and RNA
|
|
This molecule has the ability to duplicate itself (reference is made to)
|
DNA
|
|
The transfer type has a singe code word (reference is made to)
|
RNA
|
|
Of the folling molecules which one can bind to DNA sequences and control gene expression?
-Starches -Sugars -Lipids -Proteins |
proteins
|
|
For what type of product does an intron code?
|
no functional product
|
|
The production of proteins is directde by the DNA beause it is the template for...
|
mRNA
tRNA Ribosomse |
|
During protein synthesis, the substnce that attaches to a particular amino-acid molecule and posistions it on a ribnosome is...
|
tRNA
|
|
The purpose of the signal sequence found in many proteins is...
|
to identify proteins for transport to the endoplasmic reticulum and ecentually for transport to the site of function
|
|
Male honeybees and desert whiptales are produced by female parents alone. What could one conclude about tehse offspring?>
|
The offspring are genetically identical o their mothers
|
|
The one form of reproduction found in each of the 5 kingdoms is...
|
asexual reproduction
|
|
The process whereby a part of a parent organism breaks away and develops into a new indivicual is referred to as...
|
budding
|
|
Sexual reproduction is a process by which
|
nuclei of 2 sepreate cells fuse into 1
|
|
What happenes during asexual reproduction?
|
No chance in chromosome number
|
|
What happens during gamete formation?
|
A change from diploid to haploid
|
|
What change happens to chrtomosome number during fertilization?
|
a change from haploid to diploid
|
|
Fertilization is accomplished when....
|
the egg and sperm nuclei unite
|
|
The polar bodies produced with the ovum evantually...
|
remove excess genetic material then disinegrate
|
|
In meiosis the chromosomes are replicated during...
|
interphase
|
|
it begins with duplicated chromosomesconsisting of jointed pairs of sister chromatids
|
prophase I
|
|
it begins with a pair of cells each containg a single set of chromosomes
|
prophase II
|
|
homologous chromosomes pair and cross over
|
prophase I
|
|
homologous chromosomes migrate to opposite poles of the dividing cell
|
anaphase I
|
|
This phase differens from a similar phase in mitosis in that no duplication of chromosomes begins it
|
prophase I
|
|
Immediatelyafter thisphase, sister chromatids line up in the cener of the dividing cell in preparation for separating
|
prophase I
|
|
If there are 2 cells each with the homologous pairs, what is represented?
|
gametes
|
|
Conjucation in unicellular eukaryotes is an example of...
|
sexual reproduction
|
|
Meiosis I in the human female is completed jsut before...
|
ovulation
|
|
Histones are
|
nuclear proteins
|