BIO 121 FINAL EXAM 2024-2025 LATEST VERSION

BIO 121 FINAL EXAM 2024-2025 LATEST VERSION

WITH 170 QUESTIONS AND 100% CORRECT

ANSWERS GRADED A+ / BIO 121 LATEST FINAL

EXAM 2024 QS AND AS (THE ORIGINAL ONE!!)

Which carbohydrate is found in the cell walls of plants?

• glycerol
• starch
• cellulose
• chitin
• glycogen - ANSWER-C

A peptide bond is found in which type of biological molecule?

• lipid
• nucleic acid
• protein
• carbohydrate - ANSWER-C

Which listing correctly indicates a sequence of increasing biological organization?

• molecule, cell, organelle, atom
• atom, molecule, organelle, cell
• organ, tissue, atom, molecule
• organelle, tissue, cell, molecule - ANSWER-B 1 / 4

You are interested in the effect of increased carbon dioxide versus normal air on the growth of corn plants as well as the effect of green light versus full sunlight on the growth of corn plants. Your plan is to set up your experiment inside a greenhouse where you can control the environment. Which of the following is an aspect of the experiment that should be considered and controlled?

• An increase in carbon dioxide should not result in a substantial decrease of

other necessary gases.

• All seedlings come from one uniform strain.
• The intensity or brightness of the green light equals the intensity of the full

sunlight.

• All temperatures and available water remain the same for all plants.
• All of the choices are important considerations. - ANSWER-E

Which statement is true about RNA?

• One of the bases from DNA is replaced by uracil.
• It is a double-stranded molecule.
• It contains adenine paired to thymine.
• It contains the sugar deoxyribose.
• Its nucleotides contain twice as many phosphate groups as DNA's nucleotides. -

ANSWER-A

Which of these statements is NOT true about DNA?

• It contains the sugar ribose.
• The sugar and phosphate groups form the backbone of the molecule. 2 / 4

• Adenine pairs with thymine and guanine pairs with cytosine.
• It is the genetic material of the cell.
• It forms a double helix. - ANSWER-A

A polypeptide has an amino acid sequence of: alanine-leucine-tryptophan-glycine- valine-alanine. This chain of amino acids is further organized into a helix that folds in and around itself to form a globular structure. The primary structure of this polypeptide is

• pleated-sheet.
• alanine-leucine-tryptophan-glycine-valine-alanine.
• globular.
• alpha helix. - ANSWER-B

Identify the following molecule:

• amino acid
• carbohydrate
• cholesterol
• alcohol
• hydrocarbon - ANSWER-C

A polysaccharide is a polymer made up of which kind of monomers?

• amino acids
• nucleotides 3 / 4

• alternating sugar and phosphate groups
• simple sugars
• fatty acids and glycerol - ANSWER-D

Which of the following is a function of a steroid?

• insulation against cold
• transmission of genetic information
• sex hormone
• protective layer
• long term energy storage - ANSWER-C

Due to human activities, more carbon dioxide is being released into the atmosphere than is being removed. What happens to this extra carbon dioxide? Select all that apply.

• Some of the carbon dioxide stays in the atmosphere which causes surface

temperature to rise.

• Approximately half of the extraneous carbon dioxide is being expelled into deep

space.

• Much of the extraneous carbon dioxide is dissolved into the oceans where it is

causing acidification.

• Trees and other plants have increased their rates of photosynthesis and are

effectively removing most of the extraneous carbon dioxide. - ANSWER-A, B, C, D

Saturated fatty acids and unsaturated fatty acids differ in

• / 4