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BSCI 207 Final Exam Questions and Answers 100% Solved

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BSCI 207 Final Exam Questions and Answers 100% Solved Organisms are typically open systems. What is an example of something that is not open with regards exchanging mass? - the entire earth What is the best description of the relationship between autotrophs and heterotrophs? - Although an auto...

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  • October 10, 2024
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BSCI 207 Final Exam Questions and

Answers 100% Solved


Organisms are typically open systems. What is an example of something

that is not open with regards exchanging mass? - ✔✔the entire earth

What is the best description of the relationship between autotrophs and

heterotrophs? - ✔✔Although an autotroph is relatively self sufficient, it

does exchange matter with heterotrophs.

ATP is a great source of energy that enable organisms to do work. What

kind(s) of work is it used for? - ✔✔It phosphorylates metabolites to

perform chemical work and proteins to perform physical work.

Which scientist first described free energy and had it named after him? -

✔✔Gibbs

When do spontaneous reactions occur? - ✔✔They can happen if the

reactants have enough energy to get over any energy barrier.

Enzymes are useful in chemical reactions because... - ✔✔They lower

the activation energy for the reaction.

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

Membranes form spontaneously from phospholipid monomers because

bringing the monomers close together frees up the water molecules that

surrounded them. This decreases the entropy of assembly of the

monomers, but increases to a greater extent the entropy of the water

molecules. - ✔✔true

What are chaperonins and when are they needed? - ✔✔Chaperonins

may be needed to provide a controlled environment for larger biological

structures to assemble.

What is the trade off that all organisms make to achieve ordered structures

for life? - ✔✔Trade organismal order for disorder in their surroundings.

What kind of gene would you want to use to compare humans to

chimpanzees? - ✔✔Mitochondrial DNA because it changes quick

enough to aquire changes in the 6MY divergence time.

Carl Woese studied the phylogenetic relationships using the rRNA gene

because there weren't many morphological characters that could

distinguish different prokaryotic groups. - ✔✔true

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

What was the amazing discovery made by Carl Woese? - ✔✔That

archaens were a unique form of prokaryotes more closely related to

eukaryotes than bacteria.

How did Iwabe et al's study differ from that of Carl Woese? - ✔✔B. They

compared a different gene that had duplicated for the same organisms.

C. They got a gene tree for each gene copy that was rooted.

When building a phylogenetic tree to show organismal relationships, it is

best to use: - ✔✔Genes that undergo vertical gene transfer

Lateral gene transfer likely occurred - ✔✔Frequently in the last universal

common ancestral community

The ring of life is a new representation of the idea that - ✔✔The

evolution of eukarya from the merger of one archaean and one bacteria

What is difficult about determining how life arose? - ✔✔The original

forms of life probably no longer exist.

Even the simplest present day forms of life are probably more complex

than original life was.

It is unclear whether early life depended on nucleic acids or proteins.

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

What is some of the best support that early life relied on catalyzed

reactions that occurred on metal deposits near hot thermal vents? -

✔✔Present day enzymes still utilize metal atoms at their reactive

centers.

Why do organisms need to store information? - ✔✔A. Information stores

the solutions for how to metabolically interact with the environment.

B. Information can pass down enzymatic solutions to the next generation.

Which of the following is a true statement about information? -

✔✔Stability means information remains constant over time.

There are many differences between DNA and RNA. DNA is ____ stable

than RNA. This is because it is ____ stranded. This makes DNA acquire

_____ errors. However, DNA _____ autocatalytic. - ✔✔more, double,

fewer, is not

Which evidence does NOT support the idea that RNA was the first system

to both store information and perform enzymatic reactions? - ✔✔RNA is

more redundant than DNA.

Why does life require abiotic synthesis? - ✔✔It needs to generate

biologically relevant molecules from inorganic ones.

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