douglas bio review

which of the following biomolecules typically contains both nitrogen and phosphate?

• lipid

• protein

• nucleic acid

• carbohydrate

which of these statements best explains the process of energy conversion that takes place in the mitochondria?

• Energy is required for carbon dioxide molecules to form six-carbon sugar molecules

• water molecules and radiant energy are necessary for anaerobic respiration to take place

• oxygen molecules release energy in the form of heat during combustion reactions

• the energy in the bonds of glucose molecules is transferred to the phosphate bonds in ATP

A single-celled organism can be classified as a prokaryote base on the absence of

• a cell membrane

• ribosomes

• chromosomes

• a nucleus

which statement best describes the relationship between the products of photosynthesis and the reactants in cellular respiration?

• the products of photosynthesis serve as the reactants in cellular respiration to provide chemical energy

• the products of photosynthesis combine with the reactants in cellular respiration to remove ATP from the cells

• the products of photosynthesis inhibit the reactants in cellular respiration in the presence of light

• the products of photosynthesis change the structure of the reactants in cellular respiration in the presence of light

some students are instructed to put a celery stalk in a red dye solution for a lab study. First the students carefully cut out the bottom of the stalk with a scalpel. Then they put the stalk in the beaker with solution and placed the beaker on a shelf in the lab room. the next day they check the stalk and make observations. the students note that the leave at the end of the stalk have changed color form green to red. the students cut across the celery stalk and use a hand lens to see that the small tube openings along the edge of the celery stalk are also red.

How do the plant systems work together to make this movement of liquid possible?

• the roots absorb water and minerals and move them up to the stem, while the stem moves food produced in the leaves down to the roots in tiny tubes

• the roots absorb water and minerals and move them up to the stem, while the stem moves food produced in the leaves down to the roots in tiny tubes

• the roots absorb their own water and minerals, while the stem, while the stem moves food produced in the leaves down to the roots in tiny tubes

• the roots lose water vapor to the soil, and the stem loses water vapor through the leaves

a science class is planning a field trip up to a local farm that has a large pond. Which of the following list the order of biological organization from smallest to largest that the students can expect to find at the pond?

• Organism, community, population, ecosystem

• Organism, population, community, ecosystem

• population, Organism, community, ecosystem

• population, Organism, ecosystem, community

the diagram show cells in different phases of mitosis. A Student is trying to find a cell in a particular phase of mitosis. The student is looking for evidence that spindle fibers are separating the chromosomes to ensure that each new nucleus has one copy of each chromosome.

which cell is in the phase of mitosis that the student is searching for?

• cell 1

• cell 2

• cell 3

• cell 4

a student has a DNA strand

CAGCCATC

which of these DNA strands shows bases that are complementary to the ones on the students DNA strand?

• CTACCGAC

• GUCGGUAG

• GTCGGAAG

• GTCGGTAG

sickle-shaped red blood cell result from a mutation in the gene that codes for hemoglobin. This mutation results in sickle-cell anemia. a partial sequence of bases from a normal hemoglobin gene and a sequence that results in sickle-cell anemia are shown below

normal T-G-A-G-G-T-C-T-C-C-T-C

sickle cell T-G-A-G-G-T-C-A-C-C-T-C

what type of mutation is depicted in this sequence

• substitution

• insertion

• deletion

• frameshift

in cocker spaniels the allele for black coat color(B) is dominant over the allele for a brown coat color (b)

If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic rations can be expected?

• 0 BB: 2Bb: 2bb

• 1 BB: 2Bb: 1bb

• 2 BB: 0Bb: 2bb

• 2 BB: 2Bb: 0bb