ap bio midterm

which of the following best describes how amino acids affect the tertiary structure of a protein

The interactions of the different our groups with other our groups and with their environment determine the tertiary structure of the protein

which of the following predictions is the most likely consequence of a mutation

The molecule that normally binds to protein a will no longer attach deactivating cellular response

which of the following best describes the formation of the bond shown in figure 1?

a covalent bond is formed between a carbon atom and a nitrogen again along w the formation of h20

The synthesis of proteins or carbohydrate polymers always produce which of the following as a byproduct

water

which of the following best supports the claim that the Etheline initiate the signal transduction pathway that leads to ripening of fruit

loss of function and mutations in Etheline receptors result in changes to the ripening process

which of the following best depicts the tertiary structures of the two proteins in water

(the one that's most jumbled up into a ball)

what is the expected percent change in the DNA content of a typical eukaryotic cell as it progresses through the cell cycle from the start of G1 phase to the end of the G2 phase

+100%

based on figure 1 which of the following statements best describes the epinephrine signaling pathway

it involves enzymes activating other enzymes

i which of the following statements best explains Delta's role in regulating cell communication through the notch signaling pathway

Delta restricts cell communication to short distances within a developing embryo

DNA replication occurs

S phase of interphase

which of the following best describes how the amount of DNA in the cell changes during M phase

The amount of DNA is halved as the cell divides into two daughter cells

which of the following best describes the steps these cells will follow to form a gamete's

The first division will reduce the number of chromosomes by half for each daughter cell and the second division will move single chromatids to each daughter cell

which of the following statements best helps explain how cell service proteins such as MHC proteins and he cell receptors mediate cell communication over short distances

The proteins interact directly with proteins on the surface of other cells

which of the following statements correctly describes the chromosomes in each daughter cell at the end of meiosis one

each daughter cell contains 12 chromosomes each composed of two chromatids each chromosome is one pair of homologous chromosomes from the parent cell with the other homologue found in the other daughter cell

which of the following describes the initial steps in the process whereby epinephrine stimulates glycogen breakdown

epinephrine binds a cell surface receptor the activated receptor stimulates production of second messenger CAMP

A researcher claims that the epinephrine signaling pathway controls a catabolic process in muscle cells which of the following statements best helps justify the researchers claim

glycogen phosphorylase catalyzes the conversion of glucose to glucose one phosphate

which of the two following questions about genetic diversity could be most appropriately answered by analysis of the model in figure 1

how does independent assortment of two sets of homologous chromosomes increase genetic diversity

which best describes how the properties of water at an air water interface enable an insect to walk on the waters surface ?

hydrogen bonds between molecules at the surface of water provide surface tension which allows the water surface to deform but not break under the insect

which of the following is responsible for the cohesive property of water

hydrogen bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule

which of the following is most likely an immediate effect of a starvation induced increase in cortisol secretion

increased mobilization of fatty acids from fat cells

during prophase one replicated analogous chromosome pair up in undergoes an abscess what testable question is generated regarding synapses in genetic variability by figure 1

is the distance between two gene loci related to crossover rate

Which of the following questions is most appropriately raised by this scientific observation

is the lettable of genetic variation in gametes related to the amount of DNA methylation observe

which of the following statements best describes the role of adenylyl cyclases in the epinephrine signaling pathway

it accelerates the production of a second messenger

which of the following statements best describes the role of cyclic AMP in the signal transduction pathway

it acts as a second message that helps relay and amplify the signal within the cell

Which of the following is most directly responsible for waters unique properties

it forms hydrogen bonds

which of the following best describes how mitosis and meiosis results in daughter cells with different numbers of chromosomes

mitosis produces two identical diploid daughter cells after round one of division meiosis produces for haploid daughter cells after two rounds of division

which molecule will be solid at room temp?

palmitic acid, bc the absence of carbon carbon double bonds allows the molecules to pack closely together

Most cells that have become transformed into cancer cells which of the following characteristics when compared to normal healthy cells

shorter cell cycle

an explanation of how plant cells communicate across cell walls will most likely referred to the diffusion through plasmodesmata of which of the following

small, water soluble molecules

which best describes the structural difference between rna and dna?

the backbone of dna contains deoxyribose and the backbone of rna contains ribose

which of the following statements about glucose, galactose, and fructose is true?

the carbs have different properties bc they have different arrangements of carbon, hydrogen, and oxygen atoms

which of the following best describes the effect of a greater number of cysteine amino acids on the stability of proteins?

the change leads to increased protein stability because of an increased number of s-s bonds in the tertiary structure of proteins

which best shows that the fragment is rna and not dna?

the identity of each nitrogenous base

which statement helps explain the formation of hydrogen bonds represented in the picture?

the nitrogen has a partial negative charge, and the hydrogen attached to the oxygen has a partial positive charge

which best describes the structure of carbohydrates

the occur as monomers, chains of monomers, and branched structures