Intro to Bio
In a hypothesis the __________________ variable is what is being tested, while the _________________ variable is the one being measured in response.
independent; dependent
The macromolecules that make up the majority of the cell membrane’s structure are
lipids (phospholipids)
Is water polar or non-polar
polar
Which of the following statements is True?
A. Eukaryotic cells do not have a nucleus whereas prokaryotic cells do
B. Animal cells contain a cell wall for extra structural support
C. Prokaryotes divide by mitosis
D. Both prokaryotic and eukaryotes contain genetic material
Both prokaryotic and eukaryotes contain genetic material
Which event occurs in interphase? A. the cell grows B. new nuclear membranes form C. spindle fibers begin to form D. centromere divides
the cell grows
When leaving a movie theater, a person notices that the sidewalk is now wet. If the person assumes it rained during the movie, the person is making
inference
Which category of carbon-based molecules includes sugars and starches?
carbs
Explain polar vs. nonpolar and provide an example of each
polar- water loving; unequal share of electrons (sugar, salt)
nonpolar- fears water; equal share of electrons (oil, fats)
In a hypotonic solution, water will move ____ the cell, causing the cell to ____.
into; swell/lyse
Which pair is correct?
G1 phase – DNA replication
G2 phase – preparation for mitosis
S phase – cell division
M phase – cell growth
G2 phase – preparation for mitosis
When designing an experiment, scientists will test a relationship between a “cause” and an “effect.” The “effect,” also represented by what the scientist measures and records, is known as the
dependent variable
If available, the body will always digest which macromolecule for energy first?
carbs
When placed in water, oil does not dissolve and stays separate. This means oil is _________ and ___________
Clear gel-like fluid inside of the cell
cytoplasm
What type of cellular transport requires a cell to use energy?
active
Ada and Elijah have decided to do an experiment testing how sunlight affects plant growth. The students choose the same type of plants, soil, pots and amount of water they give the plants. They also make sure each plant is put in their designated area for the same amount of time each day. One plant is placed outside; one in front of a window that only gets light for 1/2 the day, and one in a closet. The students collect data every day for two weeks. Their results show that the plant outside grew the most and the plant in the closet had the least amount of growth. What are the constant variables that Ada and Elijah used in their experiment?
type of soil and type of plant
We obtain all of the macromolecules from the food that we eat except for
nucleic acids
List the 6 elements necessary for life
Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorous, Sulfur
Which of the following is found in a eukaryotic cell, but is not found in a prokaryotic cell?
A. Cytoplasm
B. Cell membrane
C. Nucleus
D. genetic material
nucleus
Which type of transport would be used? BE SPECIFIC!
When a white blood cell captures bacteria.
active- endocytosis
Explain the difference between accuracy and precision
Accuracy measures how close results are to the true or known value. Precision, on the other hand, measures how close results are to one another.
A biologist has isolated an unknown polymer form a culture of bacteria. The biologist breaks down the polymer into its subunits, which turn out to be amino acids. What type of polymer is it?
protein
Name 2 properties of water that make it a unique molecule. Explain each
cohesion
adhesion
high specific heat
less dense as a solid
terrific solvent
The basic units that are bonded together to form proteins are
amino acids
Which organelle is critical for cell division?
centrioles