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There are over 2000 kinds of edible insects in the world, and they are becoming an increasingly popular source of protein. One cup of cricket flour contains over 28 grams of protein. The building blocks of the protein in cricket flour are
Protein synthesis is accomplished primarily by the interaction of which two cell structures?
vacuole and mitochondria
ribosomes and vacuoles
nuclei and ribosomes
nuclei and mitochondria
In which cell structure is energy extracted from nutrients?
The Venus fly trap is a plant that has a unique system by which it traps and breaks down its prey. Unsuspecting insects land on the leaf and touch tiny hairs located on the leaf, triggering the leaf to close around the prey
The substance responsible for breaking down the Venus fly trap’s prey most likely contains
Certain seaweeds contain a greater concentration of iodine inside their cells than there is in the seawater surrounding them. The energy required to maintain this concentration difference is most closely associated with the action of
An amoeba is a single-celled organism. It uses its cell membrane to obtain food from its environment, digests the food with the help of organelles called lysosomes, and uses other organelles to process the digested food. From this, we can best infer that
amoebas are capable of digesting any type of food molecule
single-celled organisms are as complex as multicellular organisms
all single-celled organisms have lysosomes to digest food
structures in amoebas have functions similar to organs in multicellular organisms
The diagram represents a process taking place in a cell.
The type of organic molecule that is being synthesized is
The diagram represents the organization of structures within an organism.
Which term best indicates the structures represented by the circle labeled X?
The diagram represents a portion of a cell membrane.
The arrow indicates that the cell membrane is carrying out the process of
The two diagrams represent a sugar molecule and a fat molecule that are used by living organisms.
Which statement best describes these two molecules?
Sugar molecules are inorganic and fat molecules are organic.
Sugar molecules are organic and fat molecules are inorganic.
Energy for life processes can be stored within the chemical bonds of both molecules
Energy for life processes can be stored within the chemical bonds of sugar molecules, only
The diagram represents a cell in the human body.
Which statement concerning the structures within this cell is accurate?
Structure 1 is a chloroplast that carries out photosynthesis.
Structure 2 is a vacuole that contains DNA.
Structure 3 is a mitochondrion, where respiration takes place.
This is a plant cell
Fat molecules typically contain long chains of carbon atoms. Animals tend to store fats for use when food resources are scarce.
This is an advantage to the animal because
(1) much energy can be gained by breaking the bonds between atoms in the fats
(2) fats give off carbon dioxide that can be used by the muscles
(3) amino acids from fat synthesis are more easily digested than carbohydrates
(4) energy can only be created by digesting fats
Research has shown that treadmill training increases the number of certain energy-releasing structures in the brain cells of rats.
The cellular structures referred to in this study are most likely
The major role of carbohydrates in the human diet is to
act as a catalyst for cellular reactions
supply energy for the body
provide building blocks for amino acids
form the membranes that surround the mitochondria
One primary function of the cell membrane is
(1) regulating the flow of simple sugars into or out of the cell
(2) synthesizing substances by breaking down cell organelles
(3) storing carbohydrates, water, and starches for future use
(4) digesting carbohydrates, fats, and protein
The processes of diffusion and active transport are both used to
(1) break down molecules to release energy
(2) move molecules into or out of cells of the body
(3) bring molecules into cells when they are more concentrated outside of the cell
(4) move molecules against a concentration gradient, using ATP molecules
Organic compounds are used as building blocks for
(1) water, DNA, and starches
(2) water, proteins, and oxygen
(3) proteins, DNA, and carbon dioxide
(4) proteins, starches, and fats
In the diagram which structure would store food structure ?
Current evidence indicates that ribosomes are most closely associated with
contraction of the cytoplasm
production of DNA
synthesis of protein
regulation of mitosis
Which cell organelles are most closely associated with energy changes in a plant?
mitochondria and chromosomes
chloroplasts and mitochondria
chromosomes and nucleus
chloroplast and nucleus
which is the most accurate statement concerning protein synthesis in cells?
Proteins are synthesized by mitochondria in all living cells
Proteins are synthesized at the ribosomes in all living cells
Proteins are synthesized at the ribosomes in plant cells only
Proteins are synthesized by the nuclei in animal cells only
The genetic material of an animal cell is found in the
The ability of an organism to maintain internal stability is known as
All living things are made of one or more
Living things are made mostly of these 4 main elements
hydrogen, oxygen, nitrogen, and protein
water, protein, carbohydrates, and fat
carbon, hydrogen, oxygen, and nitrogen
glucose, salt, mineral, and base