Practice Questions

TLS Online TPP Program

#Question id: 3921

Which observation is not evidence that supports the theory that mitochondria and chloroplasts originate from symbiotic bacteria?

#Unit 3. Fundamental Processes

Genes for both mitochondrial and chloroplast RNA polymerase are encoded in the DNA of these organelles.
Both mitochondria and chloroplasts are about the same size as bacterial cells.
Chloroplast RNA polymerase is similar in sequence to that of cyanobacteria.
Both mitochondria and chloroplasts have their own DNA.

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TLS Online TPP Program

#Question id: 32400

#Unit 1. Molecules and their Interaction Relevant to Biology

Pyruvate dehydrogenase kinase is

TLS Online TPP Program

#Question id: 383

#Unit 1. Molecules and their Interaction Relevant to Biology

Three buffers are made by combining a 1 M solution of acetic acid with a 1 M solution of sodium acetate in the ratios shown below

1 M acetic acid	1 M sodium acetate
Buffer 1: 10 mL	90 mL
Buffer 2: 50 mL	50 mL
Buffer 3: 90 mL	10 mL

Which of these statements is true of the resulting buffers?

TLS Online TPP Program

#Question id: 2425

#Unit 2. Cellular Organization

Which of the following is (are) actin-based structures?

a. adherins belt b. contractile ring c. mitotic spindle

d. nuclear lamina e. stress fibers

TLS Online TPP Program

#Question id: 34120

#Unit 2. Cellular Organization

The dynamic nature of DNA binding to the histone core structure is important, because many DNA-binding proteins strongly prefer to bind to histone-free DNA. Such proteins can recognize their binding site only when it is released from the histone octamer or is contained in linker or nucleosome-free DNA.

Which of the following statement stands untrue for above fact

TLS Online TPP Program

#Question id: 2555

#Unit 2. Cellular Organization

Energy released by the electron transport chain is used to pump H+ ions into which location in eukaryotic cells?