Biology 1010: test 1

Trees take up water hundreds of feet away by

Adhesion

Which is true of the base pairing seen between two DNA strands?

Cytosine bonds with guanine

Which of the following is generally more complex than the others?

Eukarya

What is the selective advantage of keeping the surface to volume ratio low in a cell?

Maximize the relative surface area to exchange nutrients and gasses

Which process would enable a white blood cell to ingest a bacterium?

Phagocytosis

A bacterial infection such as pneumonia is most likely caused by organisms derived from the animal kingdom.

false

Is a ribosome an organelle?

false

Which would be the most accurate endomembrane route through which a protein is secreted from a cell?

rough endoplasmic reticulum→ Golgi apparatus→vesicles →plasma membrane

How are 13C and 15N different from the more abundant isotopes 12C and 14N?

13C and 15N each have one more neutron than 12C and 14N

You decide to test Charles Darwin's proposal by placing nets over some orchids that allow small pollinators to enter, but prevent the large sphinx moth from entering. You then compare the number of seeds produced by plants with and without the nets. The seed production is:

A dependent variable

You can painlessly wade into a pool, but doing a belly flop off of the high diving board hurts because of ____ in water.

Cohesion

Which of the following statements BEST summarizes structural differences between DNA and RNA?

DNA contains a different sugar than RNA.

If one strand is CCAATTG on DNA, then the complementary chain is:

GGTTAAC

Blood pH is closely maintained at a pH of 7.4. A patient whose blood pH drops below 7.35 is suffering from metabolic acidosis and can go into a coma. What happens to the concentration of H+ ions in a patient with a blood pH of 6.4?

H+ concentration is increased 10-fold

Sugars (CH2O)n dissolve well in water because sugars form ____ bonds with water.

Hydrogen bonds

When phospholipids are mixed with water their ____ interact with water and their ____ are repelled, forming a lipid bilayer.

Hydrophilic heads, hydrophobic tails

The endosymbiont theory is supported by the following evidence except:

Mitochondria have a matrix.

When a protein is denatured, which level of protein structure is unaffected?

Primary

A variety of finch species within the Hawaiian Islands have acquired different types of beaks needed for utilizing specific food resources. The process by which these different species of finches came about is likely to have involved

both natural selection and evolution.

Fats composed of fatty acids that have double bonds in the fatty acids and have fewer than the maximum number of hydrogen atoms are

liquids at room temperature.

Due to the lack of an enzyme to break down lipids, excess accumulation of lipids in the brain leads to a human disease called Tay Sachs syndrome. Which organelle is likely to be the one that lacks the proper enzyme needed for lipid breakdown?

lysosome

Sickle cell anemia is a condition in which red blood cells of patients exhibit a characteristic "sickle" shape. This arises from a mutation or change in one of the amino acids found in hemoglobin. Knowing this, what level of protein structure is most directly affected by this single amino acid mutation?

primary

When a protein is composed of more than one polypeptide chain, the arrangement of the chains is called the ____________ structure

quaternary