Final Review

Why is energy needed for active transport?

• because the molecules are negatively charged

• for molecules to move against the concentration gradient

• because molecules are trapped

• because the molecules are big

What are the reactants in photosynthesis?

• ATP and H2O

• O2 and ATP

• CO2 and O2

• CO2 and H2O

Exchanging genetic material during meiosis, like crossing over, does which of the following?

• increases the genetic variation

• reduces the diploid number to the haploid number

• increases the haploid number to the diploid number

• reduces the probability of mutations

What is the function of ribosomes?

• transferring waste

• protein synthesis

• storing genetic information

• attaching spindle fibers

How are genes expressed in cells?

• by determining the number of chromosomes in an organism

• by calculating the number of genes different organisms produce

• by activating or deactivating specific genes

• by identifying how closely related one individual is to another

Which biomolecule provides our bodies with quick energy?

• carbohydrates

• lipids

• proteins

• nucleic acids

What are the reactants in cellular respiration?

• CO2 and Glucose

• O2 and ATP

• O2 and Glucose

• ATP and H2O

True or false? mRNA is double stranded.

• true

• false

Which base does uracil replace in RNA?

• adenine

• thymine

• cytosine

• guanine

What component do all living organisms share?

• chromosomes

• the same proteins

• organelles

• DNA