bio

Okazaki fragments are formed by dna polymerase adding nucleotides to the

lagging strand

a diploid individual has a maximum of

2 alleles

if an animal population is diploid each individual possesses

2 alleles

in a human cell at prophase 1 there are ______ tetrads

4

sticky ends are

DNA fragments with single-stranded ends

to control the cell cycle

Kinases and cyclins are internal factors that

during translocation the movement of the ribosome repositions the trna linked to the growing polypeptide chain to the ___ site thereby vacating the ___ site for the arrival of a new amine-aycl trna

P;A

operon

a group of structural genes with related functions plus the closely linked DNA sequences responsible for controlling them

initiation of transcription requires

a promoter sequence

amino and carboxyl functional groups tend to form based and acids by gaining or losing

a proton

Why is it advantageous for cells to be small

a small cell has a small volume relative to surface area, thereby increasing efficient transport

the 3' end of eukaryotic pre-mrnas are changed by

adding 100-250 adenine nucleotides

Evolution is a change in

allele frequencies in a population over time

which of the following is not the correct bond for the macromolecule

carbohydrate/peptide

which of the following isn't a correct monomer/polymer paring

cellulose/triglyceride

The wobble hypothesis states that:

certain trna anticodons can pair with more than one codon sequence

A TATA box is seen in __________ cells and is the site where __________.

eukaryotic; RNA polymerase binds

considering that virtually all cells in any given individual

gene expression is regulated such that different cell types produce different protiens

which of the following must be true for a female to have hemophilia

her mother is a carrier and her father has the disease

an ultimate cause of behavior is

how and why behavior came to be

which of the following is responsible for the alpha helical structure of proteins

hydrogen bonds

as water boils and turns to steam what happens to the hydrogen bonds

hydrogen bonds break completely and allows water molecules to escape

the cell cycle of a typical somatic cell consists of

interphase and M phase

noncoding sequences located within coding regions of dna are called

introns

you isolate a cellular structure and determine that it is composed of a-tubulin and b-tubulin. what is the structure

microtubule

____ promote cancer development while ____ prevent cancer development

oncogenes; tumor suppressor genes

which statement about plasma membranes is false

plasma membranes prevent communication with other cells

the function of upstream promoter elements in eukaryotes, such as enhancers and silencers, is to

regulate the efficiency of transcription initiation

the difference between an acid and a base is that an acid ____ whereas a base ____

releases H+ ions in solution; accepts H+ ions

another word for testes

scrotum

Spermatogenesis takes place in which of the following structures

seminiferous tubules within the testes

the genetic code is sometimes called universal meaning that all organisms

share the same coding mechanism

molecules containing a large number of hydroxyl groups are

soluble in water

which of the following statements about fatty acids is true

they are composed of hydrocarbon tails and a carboxyl group

what is the purpose of a buffer

to minimize change in pH

a ___ is required to transfer genes from one organisms to another

vector

cDNA libraries contain

exon portions of expressed genes

the genetic code is sometimes called

universal