What characterizes a prokaryotic cell?

Which of the following is NOT considered a weak molecular interaction?

Acid rain has lowered the pH of a particular lake to 3.0. The hydrogen ion concentration of the lake is

A cation always has:

Nucleotides are important in

Water is able to form hydrogen bonds because

The unique sequence of amino acids in a polypetide:

An enzyme accelerates a metabolic reaction by

Which of the following organelles is common to plant and animal cells?

Which of the following components is present in prokaryotic cell?

On which of the following features do most plant and animal cells differ?

If a sexually reproducing species has a chromosome number of 2n=16, then:

A biochemist isolated and purified molecules needed for replication. When DNA was added, replication occurred but the DNA molecules were defective. Each consisted of a normal DNA strand with many DNA segments a few hundred nucleotides long. What has the biochemist left out of the mixture?

A microbiologist found that some bacteria infected by phages had developed the capacity to make a particular amino acid that they did not make before. The new capacity probably reflects

Which of the following is not true of a codon? A codon

The cells of the liver are distinct from cells of the spleen because they

Which of the following techniques would you use to produce a great number of DNA copies?

All of the following compounds are required at some stage of photosynthesis EXCEPT

Which of the following would never contribute to genetic variation within a bacterial population?

The final electron acceptor of the electron transport chain that functions in oxidative phosphorylation is

During human gestation, organogenesis occurs

Organogenesis begins with the development of the

Programmed cell death occurs normally in the development of the nervous and immune systems. This is termed

Mammals are distinguished from other vertebrates by the presence of

As humans diverged from other primates, which of the following most likely appeared first?

The major endothermic (warm blooded) vertebrates include the

Which of the following enzymes acts first during digestion?

In which of the following blood vessels would you expect to find the most nutrients?

The various metabolic exchanges occur in

Pulse is a direct measure of

Compared to interstitial fluid that bathes active muscle cells, blood reaching these cells in arteries has a

Humoral immunity is mediated primarily by

HIV compromises the immune system primarily by infecting _______ cells

Fertilization of human eggs most often takes place in the

The nitrogenous waste generated by an animal is best correlated with the animals _______ metabolism.

The concept that recognizes that the internal environment is maintained at an optimal level is termed

The functional units of the kidney control blood composition through

The coordination of movement is mediated by the

The largest and most complex part of the human brain is the

Of the following components of the nervous system, which is the most inclusive?

Which scientific name is presented correctly?

A single bacterium existing in an environment with unlimited resources and no competition would

___________ capacity is the maximum number of individuals of a species an environment can support.

Which of the following compounds is the most common compound in the bacterial cell wall?

A mycelium consists of

Genes that regulate development are conserved. This means that they

During translation, polypeptide chain elongation requires the __________ enzymatic activity

Which of the following processes occurs in the cytoplasm of a eukaryotic cell?

By executing a test cross, the genotype of an organism that expresses a dominant trait can be determined by

Ribosomes are a collection of __________ that are needed for ____________.

The genetic code is degenerate because

Epistasis refers to

FOR QUESTIONS 54, 55, 56 & 57 BASE RESPONSE ON THE FOLLOWING INFORMATION
In a species of tropical bird, wing feather coloration is controlled by the action of 6 loci: R, D, G, Y, A and B, alleles R and r, D and d, etc. Complete dominance occurs at each locus.
The R and D loci exhibit additive gene action: R__ D__ bird have dark red wings; rrdd birds have pink wings; and all other genotypic combinations at these loci result in birds with pale red wings.
The G locus is dominantly epistatic to the R and D loci; G__ birds exhibit green wing coloration. The Y locus is recessively epistatic to the R,D and G loci; yy birds have yellow wings. The A and B loci control pigment production and are recessively epistatic to the color loci; aa and/or bb birds have white wings [i.e. dominance is required at both loci for pigment production].
RrDdGgYyAaBb x rrddggYYAaBb

(just click "okay bih" in answer options)

From the mating above, what proportion of the progeny would be expected to exhibit the paternal phenotype?

From the mating above, what proportion of the progeny would be expected to exhibit the maternal phenotype?

An inbred pale red wing female is mated with a white male. The F1 (subscript 1) progeny are mated among themselves. What is the largest proportion of the F2 (subscript 2) progeny that would be expected to exhibit green wing feathers?

(I didn't have the answer for this one and I'm way too sleepy to figure it out)

A green winged female is mated with a yellow winged male. What is the largest proportion of their progeny that would be expected to exhibit pale red wings?

Which phrase regarding a Mendelian monohybrid cross is incorrect? It

Which statement about chromosome number is incorrect?

During meiosis, when are homologous pairs of chromosomes separated?

What is the pattern of inheritance for a rare recessive allele?

There are 46 chromosomes in a human diploid cell. How many autosomes are present in an egg cell?

_________ is the term for an allele that has more than one distinguishable phenotypic effect.

Experiments conducted by Meselson and Stahl demonstrated that DNA replication is

Nucleotides are composed of:

Which of the following is a normal human female?

For double helical DNA (This is Chargaff's Rule):

A human somatic cell contains _____ chromosomes.

In transcription,

Which of the following processes occurs in the cytoplasm of the eukaryotic cell?

Which of the following series represents alleles:

In the human body, gametes are produced by

During replication in E. coli, DNA is maintained as single-stranded molecules at replication fork by:

The problem of replication on the lagging strand is solved by DNA through the use of

DNA polymerase I synthesis new molecules of DNA in:

The two strands of double helical DNA are held together by

The genotypic ratio in a cross between a homozygous recessive and a heterozygous (aa x Aa) is:

Processing of primary transcripts results in

smRNPs are involved in:

What is the difference between DNA and a chromosome:

A couple who are both carriers for the gene for cystic fibrosis have two children who have cystic fibrosis. What is the possibility that their next child will have cystic fibrosis?

If factor "a" is lethal in the homozygous condition, "aa", then how many offsprings out of every 16 will survive from the cross AsBb x AaBb?

Given the parents AABBCc x AabbCc, assume simple dominance and independent assortment. What proportion of the progeny will be expected to phenotypically resemble the first parent?

What role do herbivores (organisms that eat plants) play in the energetics of ecosystems?

Which gas is most abundant in earth's current atmosphere?

Denitrification:

Most of the earth's carbon is found in:

A female African elephant produces a single offspring at interval levels of several years, caring for her young for an extended period before reproducing again. The elephant's reproductive life history is referred to as:

Offspring from a sexual union contribute only one-half as much to the evolutionary fitness of either parent as asexually produced offspring. This relative reduction in fitness is called:

Desert shrubs competing for scarce supplies of water are likely to show which dipersion pattern?

When predators and their prey exhibit cyclic population oscillations, the typical pattern is:

Hummingbirds will chase away other birds that attempt to visit backyard feeders. This interaction is an example of:

The relationship between plants and their insect pollinators is best described as:

Which of the following nutrient elements typically limits primary production in fresh water?

Which of the following ecosystems has a level of production similar to a tropical rain forest?

Mycorrhizal fungi aid in supplying what critical element to plant roots?

Production of large sized offspring is most likely linked to:

The predominant sexual system in flowering plants is:

When a population grows according to the logistic model, what is the value of "r' when the population numbers are stable?

All of the following are plant secondary compounds used for defense against herbivores EXCEPT:

Keystone predators can increase species diversity in a community because:

The first few years of succession on an abandoned agricultural field are characterized by a community of:

The largest single source of anthropogenic (human-caused) increase in atmospheric carbon dioxide: