Crowdly

Latrunculin B inhibits the formation of microfilaments.

Which of the following biological activities will be hindered under latrunculin B treatment? Please select

all that apply.

Muscle contraction

Transcription

Amoeboid movements of phagocytic cells

Endocytosis/phagocytosis

Transport of vesicles and pigment granules

pH inside the thylakoid lumen of chloroplast during photosynthesis is

significantly acidic (<7)

nearly neutral

slightly basic (>7)

Major structural

components of nucleolus are

Transcription factories

Dense fibrillar component

Granular component

Nuclear

pore complex

Centromeric chromatin

Fibrillar centers

The overall number of proteins synthesized in eukaryotic cells compared to the number of genes or open reading frames (ORF) is

Similar to the number of genes (taking into account that not all genes are transcribed in differentiated cells)

Smaller than the number of genes, since some genes encode non-translated sequences (rRNA, snRNAs, microRNAs etc.)

Significantly (several times) larger than the number of genes because of the alternative splicing

Slightly larger than the number of genes because of the alternative splicing

Promoter for which RNA polymerase is localized downstream of the initiating sequence (start point)?

RNA polymerase I

RNA polymerase II

RNA polymerase III

Cholesterol is present in the membranes of

Animals and fungi

Animals and plants

Archaea and Eukaryotes

Animals only

All eukaryotes

Bacteria and Eukaryotes

Pre-replication complex is assembled on DNA during the following period of the cell cycle:

During G1-to-S phase transition

During the entire G1 period

Late mitosis and early G1

In late G1 after restriction point/START have been passed by a cell

At what time the principle that all new cells arise exclusively from pre-existing cells and cannot self-assemble was formulated ?

in parallel with other components of the cell theory

significantly later, at the beginning of 20-th century

before other components of the cell theory

later in 19-th century

Crossovers during meiosis result of DNA repair (after double strand break) by the following mechanism

Single-strand annealing

Homologous recombination

Non-homologous end joining

Both types one and two (HR and NHEJ)