Biology questions

Question 1 (4 points)

Saving…Saved

Which of the following enzymes is needed to synthesize the DNA molecule from the viral RNA genome;

Question 1 options:

DNA polymerase

RNA polymerase

Reverse transcriptase

Replicase

Question 2 (4 points)

Saving…Saved

Viruses that persist in the cell and cause recurrent disease are considered;

Question 2 options:

Oncogenic

Cytopathic

Latent

Resistant

Question 3 (4 points)

Saving…Saved

The capsid is composed of protein subunits called;

Question 3 options:

Spikes

Protomers

Virions

Capsomers

Question 4 (4 points)

Saving…Saving…Saved

The envelope of an animal virus is derived from the ………………. Of its host cell

Question 4 options:

Cell wall

Cell membrane

Glycocalyx

Receptors

Question 5 (4 points)

Saving…Saved

The nucleic acid of a virus is;

Question 5 options:

DNA only

RNA only

Both DNA and RNA

Either DNA or RNA

Question 6 (4 points)

Saving…Saved

Enveloped viruses carry surface receptors that act as recognition sites for subsequent binding and infection of other cells, these surface receptors are called;

Question 6 options:

Buds

Spikes

Fibers

Sheath

Question 7 (4 points)

Saving…Saved

Example of virus that alters the genetic set of a host cell and transforms it to cancer cell is;

Question 7 options:

Herpes Simplex Virus

HIV

Papillomavirus

Flu virus

Question 8 (4 points)

Saving…Saved

Spikes on enveloped viral surfaces helps in;

Question 8 options:

Replication

Entry

Integration into host genome

Assembly of viral particles

Question 9 (4 points)

Saving…Saved

Endotoxins are found in which of the following organisms;

Question 9 options:

G + bacteria

G – bacteria

Both G + and G – bacteria

Some fungi

Question 10 (4 points)

Saving…Saved

Formation of biofilms is mediated by which part of the cell;

Question 10 options:

Flagella

Pili

Fimbriae

Glycocalyx

Question 11 (4 points)

Saving…Saved

Bacterial endospores function in

Question 11 options:

reproduction

protein synthesis

survival

storage

Question 12 (4 points)

Saving…Saved

Clostridium botulinum is a virus that causes neurotoxic effects (paralysis) in infected individuals.

Question 12 options:TrueFalse

Question 13 (4 points)

Saving…Saved

Viroids are short pieces of RNA with no protein coat found to infect only plants.

Question 13 options:TrueFalse

Question 14 (4 points)

Saving…Saved

Gram positive bacteria is characterized by a thin layer of peptidoglycan on its outer membrane

Question 14 options:TrueFalse

Question 15 (4 points)

Saving…Saved

A plasmid is a critical piece of DNA necessary for bacterial life.

Question 15 options:TrueFalse

Question 16 (4 points)

Saving…Saved

Undifferentiated lymphocytes exist in;

Question 16 options:

Thymus gland

Bone marrow

Lymph nodes

The liver

Question 17 (4 points)

Saving…Saved

Lymphocytes differentiate to T and B lymphocytes at

Question 17 options:

Trachea and Brain

Tonsils and blood

Thymus and Bone marrow

Liver and heart

Question 18 (4 points)

Saving…Saved

What type of immune cell first detects and processes antigens and foreign molecules;

Question 18 options:

Antigen presenting cells (APCs)

T lymphocytes

B lymphocytes

None of the above

Question 19 (4 points)

Saving…Saved

A molecule that does not initiate an immune response known as

Question 19 options:

Immune misleader

Epitope

Immunoglobulin

Hapten

Question 20 (4 points)

Saving…Saved

A molecule that initiates an immune response with an active site for immune cell recognition is known as

Question 20 options:

Immune misleader

Epitope

Immunoglobulin

Hapten

Question 21 (4 points)

Saving…Saved

Which of the following immunoglobulin classes is able to cross the placenta

Question 21 options:

IgG

IgA

IgM

IgE

Question 22 (4 points)

Saving…Saved

Which of the following immunoglobulin classes is secreted at mucus membranes (salivary glands, intestine, nasal membrane, genitourinary tract…etc)

Question 22 options:

IgG

IgA

IgE

IgM

Question 23 (4 points)

Saving…Saved

Which of the following immunoglobulin classes is associated with basophiles and mast cells in blood and mediates allergic reactions

Question 23 options:

IgG

IgA

IgE

IgD

Question 24 (4 points)

Saving…Saved

Immunoglobulins are produced by which of the following cells;

Question 24 options:

T lymphocytes

B lymphocytes

Antigen presenting cells

Neutrophils

Question 25 (4 points)

Saving…Saved

Which of the following is an example of innate immune system;

Question 25 options:

B lymphocytes

White blood cells

Skin, Saliva, Tears, and stomach acid

The spleen