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Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

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Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Chapter 7 - Geology, Earth Sciences and Ecology

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Quiz

Lesson 2 Quiz: Adrenal Glands, The Pancreas and Reproductive Gonads

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1.
The sum to infinity (S_infinity) of a geometric series exists and converges if and only if the common ratio satisfies:
|r| < 1 (i.e. -1 < r < 1), and S_infinity = a / (1 - r)
|r| >= 2
r = 1
r > 1
2.
The cells that suppress and inhibit the immune response after eliminating the microbe and secrete lymphokine proteins are:
Suppressor T cells
Neutrophil cells
Plasma cells
Helper T cells (Th)
3.
The major histocompatibility complex (MHC) protein associates within the macrophage cell with:
Perforin protein
Microbe antigen after being broken down by lysosomal enzymes to be displayed on the external surface
Secreted antibodies
Histamine molecules
4.
Plant hypersensitivity is an effective immunological method that includes:
Secreting nectar to attract bees
Stomata open at night
Root loss
The plant kills some of its infected tissues and cells locally to prevent the spread of the microbe to healthy tissues
5.
The surface immune receptor characteristic of T helper cells (Th) that enables them to recognize the antigen complex with the MHC protein is:
CD3 receptor
BCR receptor
CD8 receptor
CD4 receptor
6.
The thermal multiplex device (PCR - Polymerase Chain Reaction) depends on an enzyme that tolerates high temperatures called:
RNA polymerase enzyme
Taq polymerase enzyme
Human DNA polymerase enzyme
Amylase enzyme
7.
The two sites on the subunit of the ribosomal subunit where the two tRNA molecules stabilize during polypeptide chain elongation are:
Location 5' And site 3'
The location of the palace and the location of the IUD
Coiling site and binding site
Peptidyl site (P) and aminoacyl site (A)
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