Topic 2 Exit Tickets

which substance must be transported in the blood by lipoprotein complexes?

cholesterol

what do DNA replication, transcription and translation have in common?

complementary base pairing

which wavelength of electromagnetic radiation is absorbed efficiently by the chlorophyll for photosynthesis?

450 nm

which is the activation energy of a reaction when it is catalyzed by an enzyme?

A

a strand of mRNA consists of the following nucleotides: AUUCUGGCUA. which of the following represents the non-transcribed (sense) strand of the DNA?

ATTCTGGCTA

the fungus Rhytisma grows on the leaves of certain trees, causing a yellow lead area in which chlorophyll is no longer present. a black, tar-like stain later spreads out. what happens in the leaf when Rhytisma is present?

a reduction in the production of oxygen

which pair of molecules are products aerobic and anaerobic cell respiration in some organisms?

adenosine triphosphate (aerobic) and carbon dioxide (anaerobic)

the image shows the structural formula of a molecule. what is this molecule?

amino acid

a base substitution in a gene changed a codon. which of these consequences could result from a base substitution in a codon?

another amino acid will be incorporated in the protein, a stop codon is generated, the same protein will be synthesized

where do hydrogen bonds form?

between the slight positive charge of hydrogen and slight negative charge of oxygen in different water molecules

what is a similarity between DNA and RNA?

both are polymers of nucleotides

the most abundant structural protein in the human body is found in ligaments and skin. what is the name of this protein?

collagen

which always contains carbon, hydrogen and oxygen?

carbohydrates, proteins and fats

the graph shows the effect of increasing light intensity on the rate of CO uptake by a species of green plant maintained in conditions of constant temperature and CO concentration. which statement is consistent with the graph?

cell respiration leads to net production of CO at low light intensity

at room temperature, water is a liquid and methane is a gas. which molecular property explains this difference?

dipolarity of water

what type of molecule is formed by chemical reaction shown in the diagram?

disaccharide

the graph shows the changes in lactate and pyruvate measured in an athlete's blood during and following a mild exercise period as compared to the period before the exercise. what do these curves suggest?

during the exercise, there was not enough oxygen available for cell respiration, so the process was partly anaerobic

three flasks were prepared for an analysis of the activity of amylase. at time zero, each of the substances indicated in the diagrams were added. which flask(s) could provide support for the hypothesis that heat denatures enzymes?

flasks I and III after 15 minutes

what is life energy used for in photosynthesis

formation of hydrogen and oxygen

what describes anaerobic cell respiration?

glucose breakdown to pyruvate

how can the activity of a human amylase enzyme be increased during a laboratory experiment?

increasing the temperature from 20 degrees celsius to 37 degrees celsius

what is the advantage of using lactase in an immobilized state in the food manufacturing industry?

it is less likely to become denatured

the diagram shows the structure of palmitic acid. what type of fatty acid is palmitic acid?

it is saturated

what feature of carbon makes it most suitable as a basis for life?

its binding properties

the diagram shows a molecular structure. which type of molecule is shown?

lipid

living organisms control pH within their tissues. what is the reason for regulating pH?

many reactions can only happen at specific pH levels

the diagram shows a cycle of reactions that occurs in human liver cells. which term describes the overall reactions of the cycle?

metabolism

what is the common to RNA and DNA?

nitrogenous bases

nucleic acids are polymers of nucleotides. what parts of nucleotides are joined together in both DNA and RNA to make these polymers?

pentose sugars with phosphates

which properties explain the ability of water to dissolve solutes

polarity of water molecules and hydrogen bonding

which molecule could be hydrolyzed into amino acids?

proteins (see exit ticket for chart)

yeast cells, saccharomyces cerevisiae, were incubated with and without glucose at three different temperatures for a period of four minutes, during which the rate of CO production was measured with a CO sensor. what conclusion can be drawn from the results of this experiment?

rates of cell respiration increase with temperature

which type(s) of fatty acid in the diet is/are positively correlated with an increased risk of coronary heart disease?

saturated and trans unsaturated

for which discovery about DNA do Watson and Crick receive credit?

the shape of DNA is a double helix

meselon and stahl investigated DNA replication by first feeding bacteria with bases containing N (heavy), and then with bases containing N (light). the results are shown in the photographs. from this information, what would be the composition of the DNA in generation 3?

there will be a darker N band and a lighter hybrid band

where are proteins synthesized by ribosomes used?

within the cytoplasm