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Exam (elaborations)

MCB Exam Questions and Correct Answers the Latest Update and Recommended Versio

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When we say that the cell is the fundamental unit of life, we meant that: A. All living things are made up of one or more cells. B. The smallest entity that can be considered living is a cell. C. A single cell can carry out all life processes. D. Life doesn't exist in the absence of cells. ...

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  • October 24, 2024
  • 56
  • 2024/2025
  • Exam (elaborations)
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  • MCB
  • MCB
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MCB Exam Questions and Correct
Answers the Latest Update and
Recommended Version
When we say that the cell is the fundamental unit of life, we meant that:

A. All living things are made up of one or more cells.

B. The smallest entity that can be considered living is a cell.

C. A single cell can carry out all life processes.

D. Life doesn't exist in the absence of cells.

E. All of the answer options are correct.

✓ E


The ability of an atom to react and form bonds with another atom is determined directly by:

A. The atomic number of the atom.

B. The row of the periodic table in which the element is found

C. The number and distribution of electrons in the atom, and whether its outer shell is full

D. The number of neutrons in the nucleus in relation to the number of electrons

E.The mass of the atom

✓ C


A major difference between prokaryotic cells and eukaryotic cells is that ________

A. Eukaryotic cells contain membrane-bound organelles and prokaryotic cells do not


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B. Eukaryotic cells have a nucleus and prokaryotic cells do not

C. Prokaryotic cells have circular chromosomes and eurkaryotic cells have linear chromosomes

D. Eukaryotic cells are bigger than prokaryotic cells

E. All of these are major differences between prokaryotic and eukaryotic cells

✓ E


The central dogma of molecule biology states that information flows from

A. DNA directly to proteins

B. Protein to RNA to DNA

C. RNA to DNA to protein

D. RNA to protein to DNA

E. DNA to RNA to protein

✓ E


Which one of the following elements would mostly likely have the same number of electrons in

its outer shell as nitrogen (N)?

A. Silicon (Si)

B. Helium (He)

C. Carbon (C)

D. Phosphorus (P)

E. Potassium (K)


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✓ D


Refer to the periodic table, and decide which of the following molecules is held together by

ionic bonds.

A. NH3

B. CO2

C. CH4

D. H2O

E. KCl

✓ E


Transcription is the process by which:

A. RNA is synthesized from protein.

B. RNA is synthesized from DNA.

C. Proteins are synthesized from DNA molecules.

D. DNA is synthesized from protein.

E. Proteins are synthesized from RNA molecules.

✓ B


Which one of the following statements about viruses is incorrect?

A. Most viruses use a host's energy and cellular machinery to replicate their genetic material.

B. The hereditary molecule in viruses is composed of nucleic acids.

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C. Viruses do not possess the ability to harness energy from the environment.

D. Viruses are considered living cells.

E. All of the above statements are correct.

✓ D


Which one of the following amino acids has its R group covalently linked to the amino group?

A. Glycine

B. Serine

C. Cysteine

D. Glutamic acid

E. Proline

✓ E


Which one of the following is not a component of a nucleosome core particle?

A. Histone H4

B. Approximately 150 base pairs of DNA

C. Histone H2B

D. Histone H5

E. All are part of a nucleosome

✓ D




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