Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.
Wybierz umiejętność, rok lub poziom trudności.
Pokazujemy tylko poziomy, dla których mamy zadania.
Znaleziono 1558 zadań
A promoter lies beside the coding region of a gene. What role does it have in gene expression? A. It is the site where a ribosome binds the mature protein B. It seals Okazaki fragments after replication C. It helps recruit the machinery that initiates…
A template-DNA segment is read as 3′–TTC GGA–5′. Which pair gives the corresponding tRNA anticodons, each written 3′ to 5′? A. TTC and GGA B. AAG and CCU C. UUC and GGA D. CUU and AGG
Which levels of protein structure are visible in this representation? A. Secondary and tertiary B. Quaternary only C. Primary sequence only, with no folding D. Quaternary and a lipid bilayer
Which assignment best fits the curves? A. P: competitive; Q: no inhibition B. P: pure non-competitive; Q: competitive C. P: no inhibition; Q: pure non-competitive D. P: competitive; Q: pure non-competitive
A pathway converts substrate S into an unwanted product. Molecule J reversibly inhibits the first enzyme by competing with S. How does J act? A. It destroys all enzyme molecules irreversibly B. It binds the active site and reduces access by S C. It binds only…
Which labelled region is the site of pyruvate conversion to acetyl coenzyme A in a typical aerobic eukaryotic cell? A. P B. Q C. R D. S
Which pair supplies energy and reducing power from the light-dependent reactions to carbon fixation? A. Oxygen and carbon dioxide B. ATP and reduced NADP C. Water and ADP D. Glucose and oxidized NADP
Which row correctly places water splitting and RuBP carboxylation in a chloroplast? A. Water splitting: stroma; RuBP carboxylation: outer envelope B. Water splitting: thylakoids; RuBP carboxylation: stroma C. Water splitting: outer envelope; RuBP…
With other conditions held constant, which sketch best represents the usual effect of higher air humidity on transpiration? A. Sketch A B. Sketch B C. Sketch C D. Sketch D
What can pass through the connections X during loading at a source? A. Intact starch granules as the principal transported sugar B. Cellulose fibres for long-distance transport C. Sucrose moving between the cells D. Whole chromosomes replacing all sieve-tube…