Nature of Science
Which of the following is NOT a characteristic of living things?
growth and development
ability to move
response to the environment
ability to reproduce
ability to move
What is the main function of lipids?
stored (long term) energy
component of cell membrane
protein synthesis
leaf
What happens during translation?
mRNA code is used to make proteins
How is the word theory used in science?
-a hunch or a guess
-well supported by a wide body of evidence
-tested, highly reliable explanation
tested, highly reliable explanation of events in the natural world
Which two unique properties of water allow capillary action to occur in plants?
adhesion and cohesion
Which form of transportation across the cell membrane requires energy?
active transport
What is the overall process of photosynthesis?
Converting sunlight into food for plants.
How many amino acids are in this sequence?
ACC TCA ACT GGG TGA CAC GAT
7
Give an example of a good research practice in science.
peer review
credibility
accuracy
free from bias
Both proteins and complex carbohydrates are.... monomers or polymers?
polymers
Which events occur during the cell cycle?
Interphase, mitosis, cytokinesis
DNA replication and cell division are separated by periods of growth.
What are the reactants of photosynthesis?
carbon dioxide and water
Which type of RNA brings the information from the genetic code to the ribosome for decoding?
mRNA
One grape is placed in tap water and another grape is placed in salt water. The change in their mass is measured after a day.
What is the independent variable?
What is the dependent variable?
Ind: water
Dep: mass
How do enzymes affect activation energy?
Enzymes decrease the activation energy in a chemical reaction.
Describe what occurs during the stages of mitosis.
Prophase
Metaphase
Anaphase
Telophase
Prophase- chromosomes become visible
Metaphase- meet in the middle
Anaphase- chromosomes separate
Telophase- nucleus reforms
What factor limits the size of mosses and bryophytes?
They lack vascular tissue.
What are two similarities of DNA and RNA?
What are two differences?
Similarities - NA, nucleotides, bases, transcription
Differences - deoxyribose sugar, ribose sugar, replication, translation, stays in nucleus, leaves nucleus, etc.....
4 hours -- 323 mm
8 hours -- 400 mm
12 hours -- 357 mm
Give an inference that supports the data.
Giving the broccoli plant too little or too much sunlight will slow down plant growth. The recommendation given by the broccoli manufactures does correlate for best production of broccoli.
What is the relationship between nucleic acids and proteins within the cell?
nucleic acids contain the information to make proteins
Does mitosis occur DIFFERENTLY among different types of cells? Why?
NO! Mitosis always occurs the same way.
Mitosis always maintains the same number of chromosomes per cell.
What is the difference between the palisade mesophyll and the spongy mesophyll?
Palisade- tightly packed chloroplast for light absorption
Spongy- loosely packed for gas exchange
What is the likely effect of a mutation that changes a single base in a DNA sequence to a mutation that inserts a base?
Changing a single base will SOMETIMES change the amino acid sequence. Adding a base will ALWAYS change the amino acid sequence.