QUESTIONS WITH DETAILED VERIFIED
ANSWERS; ALREADY GRADED A; 2026
1) Evolution is described as change from pre-existing life forms
to modern-day organisms. What actually changed?
A) rate of reproduction
B) ability of organisms to cope with external stimuli
C) energy and nutrition demands of the organisms
D) genetic makeup of the species
E) the species' physical appearance - correct answer- D)
genetic makeup of the species
1) Which of the following lowers the activation energy of a
biochemical reaction?
A) presence of catalysts (enzymes) D) high temperature
B) low concentration of reactants E) altering pH to 7
C) high concentration of products - correct answer- A)
presence of catalysts (enzymes)
1) Which of the following macromolecules possess large
nonpolar regions making them insoluble in water?
,A) Proteins C) Lipids
B) Carbohydrates D) Nucleic Acids - correct answer- C) Lipids
10) If a double-stranded DNA molecule contains 30 percent T, it
must contain percent G.
A) 20 B) 30 C) 40 D) 50 E) 60 - correct answer- A) 20
10) Secreted proteins would be synthesized on ribosomes
A) on the rough endoplasmic reticulum
B) on the smooth endoplasmic reticulum
C) on the Golgi complexes
D) found in the cytoplasm
E) found in the nucleus - correct answer- A) on the rough
endoplasmic reticulum
10) The characteristic of DNA that allows it to make an exact
copy of itself is
A) its sugar-phosphate backbone.
B) its complementary base pairing.
C) the phosphodiester bonding of the helices.
D) the twisting of the molecule to form a helix.
, E) its antiparallel strands. - correct answer- B) its
complementary base pairing.
11) All the following are important functions of the cytoskeleton
EXCEPT
A) support of organelles.
B) storage of food molecules.
C) movement of organelles.
D) maintenance of shape.
E) maintenance of organization in the cell. - correct answer-
B) storage of food molecules.
11) Meiosis can occur
A) in all organisms.
B) only in haploid organisms.
C) only in diploid organisms.
D) only in multicellular organisms.
E) only in unicellular organisms - correct answer- C) only in
diploid organisms.