Final Biology Study Material Part A

What term refers to an organism having two different alleles for the same trait.

• homozygous
• heterozygous
• purebred
• gametes

Which of the following is an example of the make-up of a nucleotide found in a DNA?

• ribose + phosphate group + thymine(base)
• ribose + phosphate group + uracil(base)
• deoxyribose + phosphate group + uracil(base)
• deoxyribose + phosphate group + cytosine(base)

Which scientist studied the DNA molecule using a technique called X-ray diffraction?

• Frederick Griffith
• Oswald Avery
• James Watson and Francis Crick
• Rosalind Franklin

What is the function of DNA?

• store and transmit genetic information
• store energy
• help fight diseases
• quick energy for the cell

Which example is said to be heterozygous?

• TT
• Tt
• tt
• both tt and TT

The cell membrane is described as a bilayer because it consists of:

• A) Two layers of proteins
• B) Two layers of phospholipids
• C) Two layers of carbohydrates
• D) Two layers of nucleic acids

To release the energy stored in ATP, the cell sends an enzyme to break bonds _________.

• between ribose and a phosphate
• between adenine and ribose
• between the phosphates
• between adenine and a phosphate

What is the small openings (pore) on the underside of a leaf through which oxygen and carbon dioxide can leave and enter the plant called? Also transpiration occurs through these pores on the plant.

• stomata (stoma)
• guard cells
• palisade mesophyll
• spongy mesophyll

What is the phenotypic ratio of this Punnett square? A=Axial flower position and a=Terminal flower position

• 25% Axial flower postion: 75% Terminal flower position
• 50%Aa:50%AA:23%aa
• 25%aa:50%Aa:25%AA
• 75% Axial flower position: 25% Terminal flower position

Organisms, such as plants, that make their own food are called

• autotrophs.
• heterotrophs.
• thylakoids.
• pigments.